Skills for Apprentice/Full Knight

Battle mastery (passive)
Book of battle tactics that raises ATK
Skill Level 4, ATK +25     (Apprentice)        
Skill Level 5, ATK +30     (Full)

Protection
Reduced the amount of damage sustained by physical attack
Skill Level 3, MP70, 5 minutes time DEF +40 effect     (Apprentice)

Defense (passive)
Offers a permanent gain to DEF, protecting you from attack.
Skill Level 4, DEF +11     (Apprentice)
Skill Level 5, DEF +13     (Full)    

Provoke
Provoke and anger your for, making you the target of future attacks
Skill Level 3, MP8     (Full) 

Hard hit
Delivers more damage to foes than regular attacks
Skill Level 1, MP24     (Apprentice)
Skill Level 2, MP36     (Full)
Skill Level 3, MP48     (Quest, Saterica, Level 110+)

Warcry
Raises ATK and MaxHP for all party members in the area
Skill Level 1, MP64, 2 minutes time effect, ATK + about 8%, MaxHP + about 8%     (Apprentice)
Skill Level 2, MP96, 3 minute time effect, ATK + about 12%, MaxHP + 12%     (Full)

Relax (passive)
Loosen up the body. Raises natural HP recovery
Skill Level 1, +10 HP natural recovery, MP natural recovery +5     (Full)
Skill Level 2, +20 HP natural recovery, MP natural recovery +10     (Quest, Kaure Reef, Level 100+)

Guard
Defend the target against attack, reducing HP damage
Skill Level 1, MP96, 2 minutes time effect     (Full)

Berserk
An all-out attack that lasts until your MP is drained
Skill Level 1, MP150, 11 + ○ seconds consumption MP150 +150 × ○ → duration)     (Quest, Sofya, Level 70+)
※ (about 1.5 times the fastest) about 16 times in the attack 12 seconds duration
※ Additional effect: +200% skill items unavailable ASPD recovery
※ DEF-50% MDEF-20% HIT +10% AVD-50% poison-paralysis upon activation?