#3
Minstrel
This class is recommended for love the role of supporting and fighting in parties, being mostly party dependent. It is also for those of whom who're patient, having to wait for around 8-10 seconds per song to cool down thus, being vulnerable to incoming attacks. But, it can also be seen that the Minstrel is a bit versatile - having offensive and/or defensive potentials when done right (In my opinion). In addition, Minstrels have no weapon mastery! This adds more versatility into the minstrel!
About Minstrel song skills:
For all Minstrel skills, visit the Japanese Iruna Wikipedia in the following link here. There is one additional drawback to minstrel songs other than the skill delay and that is the maximum amount of songs that can take effect: two (2). Therefore, strategize your songs to maximize your party's (or your own) potential!
About MP of Minstrel song skills:
My builds don't focus on reduced MP consumption. Why? There is a skill called Dream Song, which reduces all skills MP use to 1 - but raises skill delay (see "About Dream Song"). In my opinion, focus on raising your HP because each song, other than Humming, eats 10% of your HP - which is real bad if you have low maximum HP. So to counter that, I decided to curve it using my own ways. Raise your maximum HP so that when you use a song, you would have a pool of HP (enough to survive - survivability factored by your skill, in my opinion).
About Builds, Equips and Spina:
I did not factor the financing part, therefore, spina is not a factor. These are all my opinions - this is from my gameplay perspective. Most of these equips are currently released - it will be updated if more efficient equipment(s) come out. The possibilities of different builds are INFINITE. It's your gamestyle! These are just the basic builds and equipments (in my opinion). 
About Song Buffs (those released in English servers):
Passionate Song - Efficient for melee classes, buffing their base ATK and base ASPD
Life Song - Efficient for most classes, dramatically increasing their base HP
Wisdom Song - Efficient for magic classes, buffing their base MATK and base ASPD
Dream Song - Efficient for heavy MP use classes, decreasing their skill MP use to 1, but unfortunately, increasing skill delay by 1 to 1.5 seconds.
About Dream Song:
Although Dream Song sounds divine and all, it is not recommended, from my perspective, for buffing classes that depend on decreased skill delays (e.g. Sniper for Arrow Rain, Assassin for Backstab, Ninja for Bunshin no Jutsu, Desperate Move, and Dance of Clones, etc.). I've tested this before and it was a pain in the ass to wait for cool down to finish. 
"Every second counts."
About Humming:
A song that heals the HP and MP of the party by a small amount - only healing the HP of the user. The only skill (at the moment) that doesn't eat 10% of your HP. It can come in handy...especially when wizard runs out of MP for some reason and HP is low...use humming several times and wizard should be ready to feed MP to party. I don't know how you would perceive this skill, but this is how I view it. 
About Dragon Song:
A party dependent attack song that eats 300 MP and 10% of your HP - does damage according to the amount of members within your party. From what it could be seen, it is ATK based and CRT [and INT?] based, too. Great for
supporting the party with damage, but not solo.
Builds and Equipment(s)
"Support Minstrel"
VIT = DEX > INT
I am attracted to the capabilities of surviving in the party at story of tough corners, however, I am more attracted to the hastened skill delay to able myself to sing faster, leaving me less vulnerable to my target and to rise the buffer potential of my party. I, therefore, discontent of the battle - inferior in combat aspects. (Yes, Skill Delay reduce equips and xtals work on Minstrel skills. It's been tested )
Equipment
Weapon:
Violakrile, for -1.4 second skill delay
Orichalcum Hammer for HP
Body:
Exelis Upgraded, for -1 second skill delay
Chainmail Upgraded, for HP boost
Saltus Upgraded, for HP boost
Additional Equip:
Wolf Ears Upgraded, for -0.6 second Skill Delay
Idealsol, for HP boost
Edel Hood, for higher defense
Force Helm, for -.05 second Skill Delay
Special Equipment:
"Wire Puzzle" (Not released yet), for -0.5 second skill delay
Mythril Loop, for HP boost
Santa Gloves, for HP boost
Seahorse Bangle, for HP boost (if HP is less than 15,000)
Stone Figurine (from Strano), for HP boost (only if HP is less than 15,000 and your level is 180+)
Crysta:
Metalbrow, for -0.5 second skill delay (4 for 2 seconds if all equips are slotted, 5 for 2.5 if all equips are slotted and weapon is dual slotted) - used for Skill Delay set. If equipped with all 5 metalbrow and skill delay equips, in addition to max DEX, skill delay is -7.5 seconds.
Kaize Pilz, for +30% HP. Caution, do not use more than 1-2 Kaize Pilz - it is like giving your target a MATK and ATK +10% (per Kaize Pilz) crysta.
HP+20% - For HP boost.
Key Star Abilities:
Quickcool, for skill delay
Vitality, for HP
Melee Defense, for Melee Defense
Magic Defense, for Magic Defense
How it all comes down
Attacking with this set is meaningless, as I have little to no attack potential (because of the Metalbrow crysta). I am to support my team from the back lines, singing to support. As the aggression of our target thwarts towards I, I am to switch to the HP set to stand the ground until I lose the aggression of my target. It is not recommended for me to pose as a meat shield to protect the allies for I do not have strong capable parrying and defense abilities as thine Paladin and copies of I such as, the Ninja and the elusive evasive capabilities as my fellow Assassin.
"Dragon Song Minstrel"
AGI = CRT = DEX or STR
I am attracted to abandon my defensive qualities to combat alongside thy ally/allies at full force. I therefore use my quick senses to attempt to evade the incoming. I use the Song of Dragon, power of which varied by the members of party, to inflict the heavy damage, decimating my target. I am to love the special bow and nail for it increases the output of my damage.
Equipment
Weapon:
Yumi (Bow), based off of AGI (+2.5 ATK per AGI) and CRT (+1 ATK per AGI) and DEX (+1 ATK per DEX when EQUIPPED WITH THIMBLE ONLY) and STR (+1.1 ATK PER STR when EQUIPPED WITH KONGO ARROW (Not Released) ONLY)
Kodachi II (Nail - for temporary use. More efficient nails for minstrel are not yet released)
Body:
Ultimi (Not yet released), refer to video here by Dragir1, for status of equipment.
Schwartz Upgraded, for critical damage
Dunkelheit, for critical damage and ATK
Dragonmail, for critical damage and ATK
Additional Equipment:
Gourd, for critical damage
Suishin Katana, for critical damage and hidden ATK boost by chance when defending
Horned Helm Upgraded, for ATK and HP boost
Glory Cape (Not yet released), for ATK boost, Magical and Physical Resistance, and small VIT and INT boost
Force Helm, for ATK boost and -0.5 Skill Delay
Special Equipment:
Atleta Ring, for ATK
Powerful Ring, for ATK and MP (Only when level 200+)
Seahorse Bangle, for HP
Stone Figurine, for HP (if level 180+)
Thimble, for ATK, if using bow and DEX
Crysta:
Ganei, for ATK, in special equipment
Plazuda, for ATK, in weapon
Cerberus, for critical damage, in body
Boss Colon, for ATK, in additional equipment
Key Star Abilities:
Melee Power, for ATK
Vitality, for HP
Fluency, for CSPD
Quickcool, for Skill Delay
How it all comes down
I have low HP and defense, therefore, I am to stay at the back and ward off the aggression of my target within the party. I use my evasive capabilities to aid in my survival. I prioritize myself the damage, automatically attacking target and to aid with the Song of Dragon within the party to inflict massive damage. The skill delay of songs are horrid, therefore, I must time the cast to reduce vulnerability. I am notified to hold back at majority time and use special bow to avoid the area of effect of target, if any. Nail, use at risk.
"Counter-Offensive Counter-Defensive Minstrel"
VIT=INT > DEX or CRT
I am attracted to the tanking aspect and support of the party although I am not the paladin or ninja. Indeed, my damage is minute but, I have the trick of the sleeve: counterattacking and autoskill. I am too absorb the damage and combat against the target with autoskill counterattack. In addition, I support myself through the offensive autoskill - to deal the damage by chance through my hits. I, too, have to occupy in the party for the support of the healer.
Equipment
Weapon:
Dia Espada, for autoskill trigger when attacking
Orichalcum Hammer, for HP boost
Dragon Roar, for HP boost
Body:
Dark Priest Robe Upgraded, for defensive counterattack autoskill
Plate Armor Upgraded, for defense and damage reduce by chance
Ultimi(Not released yet), for accuracy boost and MATK boost - for the magic autoskill(s)
Chainmail Upgraded, for HP boost
Saltus Upgraded, for HP boost and Item use - delay
Additional Equipment:
Idealsol, for HP boost
Glory Cape (Not released yet), for MATK and ATK boost, Magical and Physical Resistance, and Autoskill
Hairband, for autoskill
Monty Barrette/Baret (Not yet released - is it a hat or hair ornament? O.O), for Magical and Physical Resistance, Item
Recovery boost, Skill Delay decrease, and Hit boost.
Mir Symbol (Not yet released), for Autoskill Boost, MATK boost, and ATK boost
Special Equipment:
Fearsome Claw, for autoskill generation
Knight Gauntlet, for ATK boost, and HP boost
Crysta:
Kaize Pilz, for +30% HP. Caution, do not use more than 1-2 Kaize Pilz - it is like giving your target a MATK and ATK +10% (per Kaize Pilz) crysta.
HP+20%, for HP boost
Sandwurm, for autoskill boost
Simcracker, for autoskill boost and HP boost (When equipped to body)
Sofys, for light attribute magic counterattack
Anubites, for dark attribute counterattack
Mezzaluna, for MATK boost
Isurugi, for MATK boost
Beelzenom, for Hit boost and MATK boost
Provoke, for the "Provoke" skill
Auto Provoke - can be synthesized at Capital City Sofya, autoskill Provoke by chance of attack.
There are many MATK and autoskill crystae - I cannot list them all, I just listed the ones that are released in English - will update if more are released. CAUTION - There are some crystae that "consume autoskill" - do not put them in equipment with autoskill or it will eat it up and replace it with the crysta autoskill effect.
Key Star Abilities:
Automatic, for autoskill
Magic Force, for MATK boost
Vitality, for HP boost
Magical Defense, for Magical Defense
Melee Defense, for Melee Defense
How it all comes down
I have higher defensive qualities than the rest of build for minstrel. I stand in the front lines, absorbing damage and provoking my target to ward thy away from the ally. To absorb damage and to then counter with the magic counter-skill and offend with the autoskill - a combination of defense and offence. I am to think not I have higher defensive capabilities of the paladin and enchanter. I, just like all, am party dependent - to be healed by healer and support. I, too, can support the party with my songs to increase party potential.
"Dragon Song Minstrel"
STR = INT > CRT = DEX
I am attracted to the party and the supporting of fighting alongside with the party. I am attracted to the Song of Dragon, to which its power varies by the member of party itself. I, in addition, reduce the casting speed and skill delay of song a small amount - to which my song buffs the party, allowing higher potential of the party. I use [the cane and] the throwing - to which it increases damage potential, the attack power, of my song.
Equipment
Weapon:
Fuma Shuriken Upgraded, for Cast Time Reduce and Skill Delay
Artemis (Not yet released), for Critical Damage and Cast Speed.
Dragon Roar, for Critical Damage and HP boost
Body:
Exelis, for Skill Delay and ATK boost
Dragon Mail, for ATK and Critical Damage
Ira (Not yet released), for Critical Damage and ATK boost
Emido (Not yet released), for Casting Time
Additional:
Glory Cape (Not released yet), for ATK boost and Magical and Physical Resistance
Mir Symbol (Not yet released), for ATK boost
Horned Helm Upgraded, for ATK boost and HP boost
Idealsol, for HP boost
Force Helm, for ATK boost and -0.5 second skill delay
Special Equipment:
Atleta Ring, for ATK boost
Powerful Ring, for ATK boost and +10% MP (If level 200+, -40% MP if below 200) boost
Seahorse Bangle, for HP boost
Stone Figurine, for HP boost (For level 180+)
Toughness Ring, for HP boost
Silk Mittens, for HP boost (Recommended to not use VIT when equipped - lowers mitten HP boost)
Auler, for Attack Speed boost
Crysta:
Plazuda in weapon, for ATK boost
Ganei in special equipment, for ATK boost
Boss Colon, for ATK boost
Bossheit, for ATK boost, HP boost, and MP boost
Max HP+20%, for HP boost
Kaize Pilz, for +30% HP. Caution, do not use more than 1-2 Kaize Pilz - it is like giving your target a MATK and ATK +10% (per Kaize Pilz) crysta.
Simcracker in body, for HP boost
Minenaga in body, for Critical Damage Boost
Cerberus, for Critical Damage Boost
Kaiser
Key Star Abilities:
Vitality, for HP boost
Melee Attack, for ATK boost
Critical, for CRT boost
Strength, for ATK boost
Intelligence, for MDEF and MP boost from INT boost
How it all comes down
I come on the battlefield, to stay back in line - support by the damage of song (Song of Dragon) and buffer effect of song, to increase status of party and I, and to not thwart the aggression of my target towards I (When in party), for I have low HP. For when aggression targets me, I switch to the HP gear and attempt to lose the aggressiveness of my target towards me (when in party). I attempt to maximize the power of the Dragon Song, increasing mine attack and critical and to do so, defensive capabilities are to lower. This, could be combated through the switch of attack gear to HP - increasing survivability but lowering the attack power. The power of the throw - to attack from a distance and resist urge to advance to front of line. Regular attacks lag - as attack speed is of lowest although the damage is of decency. Party dependent. To increase the attack speed, equip the Auler and to utilize the Song of Compassion to increase the damage output and the attack speed rate.
"VAMPIRE MINSTREL" 
INT > STR or VIT > STR or VIT (STR if VIT is already chosen for second stat, VIT if STR is already chosen for second stat) > DEX > AGI or CRT
(Lol, I made this build at the top of my head - funny topic, lol...in the end, it was tested and worked out pretty fine, in my apsect, that is) I am attracted to the high HP and the capability to drain the HP of my opponent - to in addition, use the song buff to increase potential of class and to support the party, too. Party dependent, I am, for the wizard and healer to increase aid in recover of MP. I could be independent, with the high HP and high MP from VIT and INT - a high defence. I use the various weapons to aid absorption and Skill Delay and Cast Speed of Song of Dragon, to be used in case.
Equipment
Weapon:
Diabolos, for ATK boost and Hate reduce
Caduceus, for Drain trigger chance by attack and Cast Speed
Lamia, for absorption of HP by chance of attack
Fuma Shuriken, for the Skill Delay
Body:
Exelis Upgraded, for Skill Delay and Attack boost
Dragon Mail, for ATK boost and counterattack by chance in defense and to lower the incoming
Iron Armor Upgraded, for HP boost and reduced stun period
Chainmail Upgraded, for HP and MP boost
Armadora, for ATK boost and Physical Resistance
Saltus, for Item Delay Reduce, HP boost, and ATK boost
Plate Armor Upgraded, for small HP boost, Physical Resistance, and Reduce Incoming Damage by chance of defense
Additional Equipment:
Idealsol, for HP boost
Horned Helmet Upgraded, for ATK boost and small HP boost
Schmuck Upgraded, for ATK boost
\Wolf Ears Upgraded, Skill Delay
Hairband, for autoskill boost
Special Equipment:
Powerful Ring, for ATK boost and MP boost (MP boost if level 200+. If below 200, MP reduced)
Power Ring, for ATK
Knight Gauntlet, for HP boost and ATK boost
Santa Gloves, for HP boost
Stone Figurine, for HP boost (If level 180+ and if HP is below 15,000)
Seahorse Bangle, for HP boost (If HP is below 15,000)
Toughness Ring, for HP boost (If HP below 15,000)
Atleta Ring, for ATK boost - resist the urge to automatically attack. Use at risk.
Fearsome Claw, for autoskill generation
Lotus Seeds, for Autoskill boost
Crysta:
Vampire Blow, for "Vampire" skill (Does damage equal to your ATK, no crit. 1/3 of damage is taken to heal yourself)
Bossheit, for HP and MP boost and ATK boost
Kaize Pilz, for +30% HP. Caution, do not use more than 1-2 Kaize Pilz - it is like giving your target a MATK and ATK +10% (per Kaize Pilz) crysta.
Max HP+20%
Boss Colon, for ATK boost
Plazuda in weapon, for ATK boost
Ganei in special equipment, for ATK boost
Schlingel, for ATK boost
Simcracker in body, for Autoskill and HP boost
Key Star Abilities:
Melee Attack, for ATK boost
Vitality, for HP boost
Melee Defense, for Melee DEF
Magic Defense, for Magic DEF
Mild, for Hate reduce
Saving, for reduced MP use
How all this comes down
My position is versatile in the battlefield - out back, to reduce aggression of Area of Effect of my target and to distance attack automatically and to apply Song of Dragon to inflict damage, in addition to buffing my party. In front, to act as tank if desired - to in addition, apply the Vampire Blow to my target and to heal myself and to utilize the effect of such weapons as Caduceus and Lamia for further HP absorption. I should not think I can overcome all like for I do have the defence and HP and parry and aggression attraction of the paladin and the highest of DPS. There, the trick: reduce the hate of myself when up front with the tank in a party - near my target, to be able to absorb HP without losing HP in the process - to fall back and attempt to lose aggression in the party if such instance to occur on myself. I also use the bow and throwing, to distance attack - especially the Diabolos, reduces hate of my target to myself. In such dangerous case, to use the HP set to increase survivability.
"Dragon Song Minstrel (Magic Bow Revision)"
INT > DEX > CRT (> VIT (Value of VIT at ~50 for survival))
I am attracted to the party and the supporting of fighting alongside with the party. I am attracted to the Song of Dragon, to which its power varies by the member of party itself. I, in addition, reduce the casting speed and skill delay of song a small amount - to which my song buffs the party, allowing higher potential of the party. I use the magical bow, to which it increases my damage via INT and DEX.
Equipment
Weapon:
Sorciere Bow, for -0.5 skill delay and Magic Bow status (+2 ATK per INT and +1.5 ATK per DEX, +2.5 ATK per DEX when equipped with thimble)
Body:
Exelis, for Skill Delay and ATK boost
Dragon Mail, for ATK and Critical Damage
Ira (Not yet released), for Critical Damage and ATK boost
Emido (Not yet released), for Casting Time
Ultimi Upgraded and above (Not yet released), for ATK boost, -0.5 delay, and Critical Up
Additional:
Glory Cape (Not released yet), for ATK boost and Magical and Physical Resistance
Mir Symbol (Not yet released), for ATK boost
Horned Helm Upgraded, for ATK boost and HP boost
Idealsol, for HP boost
Force Helm, for ATK boost and -0.5 second skill delay
Auler, for Attack Speed boost
Special Equipment:
Atleta Ring, for ATK boost
Powerful Ring, for ATK boost and +10% MP (If level 200+, -40% MP if below 200) boost
Seahorse Bangle, for HP boost
Stone Figurine, for HP boost (For level 180+)
Toughness Ring, for HP boost
Silk Mittens, for HP boost (Recommended to not use VIT when equipped - lowers mitten HP boost)
Thimble, for additional +1 ATK per DEX when equipped with bow (Works with Magic Bow, too)
Crysta:
Plazuda in weapon, for ATK boost
Ganei in special equipment, for ATK boost
Boss Colon, for ATK boost
Bossheit, for ATK boost, HP boost, and MP boost
Max HP+20%, for HP boost
Kaize Pilz, for +30% HP. Caution, do not use more than 1-2 Kaize Pilz - it is like giving your target a MATK and ATK +10% (per Kaize Pilz) crysta.
Simcracker in body, for HP boost
Minenaga in body, for Critical Damage Boost
Cerberus, for Critical Damage Boost
Kaiser
Key Star Abilities:
Vitality, for HP boost
Melee Attack, for ATK boost
Critical, for CRT boost
Strength, for ATK boost
Intelligence, for MDEF, MP boost, and ATK boost (from Magic Bow) from INT boost*
*Unsure if it increases ATK for Magic Bow - will have to test later
How it all comes down
I come on the battlefield, to stay back in line - support by the damage of song (Song of Dragon) and buffer effect of song, to increase status of party and I, and to not thwart the aggression of my target towards I (When in party), for I have low HP, to use the VIT to increase the survival-ability of myself. For when aggression targets me, I switch to the HP gear and attempt to lose the aggressiveness of my target towards me (when in party). I attempt to maximize the power of the Dragon Song, increasing the attack of mine and critical and to do so, defensive capabilities are to lower. This, could be combated through the switch of attack gear to HP - increasing survivability but lowering the attack power. The power of the Magic Bow, to increase damage vary the INT and DEX - the INT to increases the mana pool and magical defence and DEX to increase the damge, too, of bow and to decrease the skill cool-down of skils to increase the support of the party and I. Regular attacks lag - as attack speed is of lowest although the damage is of decency. Party dependent. To increase the attack speed, equip the Auler and to utilize the Song of Compassion to increase the damage output and the attack speed rate.
GUIDE UNDER CONSTRUCTION. NEED TO ADD TOUCHES TO GUIDE. NEW IDEAS ARE BEING DEVELOPED AS TIME GOES. 
