Pros and Cons of Classes

Depend on what u want to avhieve with that class. No class is the best class, all have its own pros & cons.
For me, enchanter is the most all round class. It can be a good soloer/ a good tanker / a good support
The only cons of enchanter is this class is really depend on gears. Need to collect many gears & xtals to see envhanter's true power

I feel like sharing

Gladiator

Pros:

- Awesome damage with expensive gears
- Automatic counter each time got hit. Can abuse Solid Skin/Cross Counter
- Almost never uses potions @260+ (1mp cost, autoskill HP and MP recovery+20%), great for leveling
- Great for completing the story (which is probably the whole point of the game) / Soloer / independent
- Versatile / good at both tanking and damaging
- Advantage of elemental bonus, wide array of weapons
- Really powerful at high levels / high stats

Cons:

- Mediocre damage with poor gears
- Potion hungry before 260, mainly Solid Skin for 100mp
- Always at the fence, not the best at damaging or tanking (but good at both)
- Late bloomer
- Poor AOE range


Weighing them, the pros still previal. If you're into doing things alone, gladiator is your guy. ; )

Sniper is my favorite

Pros
Very high damage and range
Prevents most of the aliments in game
Levels extremely fast at 240+
Rarely a need for hp potions, you defeat mobs before they touch you.
Simple stat build
Ridiculous AoE range

Cons
Consumes a lot of mp potions before lv 240
Can't solo high level bosses
Difficult to find a party at times
Lacks in terms of survival.

My favorite is Assassin. I have played this class for very long time. I feel good when I play something that less people do.

Pros
-Highest DPS physical damaging class (Used to be highest damage class in game, but not anymore)
-High evasion rate without agi
-Killing bosses very fast

Cons
-So squishy with all bosses
-Needs to know lots of concept behind damage calculation and delay
-No AoE!!
-Hard leveling
-Mp always runout(Spamming type)

Even the cons outweigh the pros, I still love this class.

Um.. so.. Less than an hour after I said that, and I was really mad.. I decided to try to farm pole.. 3 kills.

I'll share the two I've had the most experience with, Ninja and Assassin. I'll edit Assassin part later on

Ninja- 
Pros: 
High Survivability (If you know what you're doing)
Can be used as a Experimental class. What I did back when I was a Ninja, was solo bosses to figure out their patterns, this in turn helped my other characters. 
Equipment is generally cheap except slot specials 
Good class for a newbie who's starting out.

Cons
Stun is your enemy, also sometimes debuffs.
There is an over-abundance of Ninjas within iruna
Magic Ninja is a art of itself I applaud those who can play it :v 
Salts and other Vaccines take up majority of your bag space
Lots of Quick Cool for DoC spam
Majority of the newer ninjas have given Ninja a bad rep. 
Most Ninjas are new and don't know much of what they're doing

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Assassin-
Will add in later gotta go lol

Paladin

PROS

High Survivability (High HP and Defensive Skills, enough to make bosses look like wimps)
Exceptional Tanking Capabilities (also the only class that can protect others via Devotion)
Good MP Pool even with 1 INT
Destroys dark mobs and bosses with Gloria (+50% elemental vs Dark, +20% when applied to other players)
Relatively cheap gear required to be effective (prior Lv260)
Can live along without dispelling common ailments (poison, blind, paralysis, except when you use oath)
Guardian penetrates high DEF barriers
Guardian is AoE upto 3 mobs
Knights Oath can kill upto 5 (possibly 6) mobs in 1 hit
Effective solo/party grind for regular mobs via guardian spawn glitch
Effective solo grind for boss via guardian on lower bosses, knights oath on higher bosses
Can solo all bosses so far (under a minute if you use oath)
Can revive other players (well without veltria, at least)


CONS

Guardian and Oath eats your HP
Susceptible to HP% attacks (they are there to prove you are still mortal)
Very heavy potion consumption for solo Guardian user (significantly reduced pot consumption with Knight's oath)
Requires high investment on gears and apostolia levels to make effective Knight's Oath
Guardian is relatively weak in DPS via 1 on 1
Knights Oath does not penetrate high DEF barriers