Game the easiest by abusing Mechanics? Mage. Int reduces Cooldown ( i assume Warrior Cooldowns too ). -> Invisibility has 1 Round Cooldown. with Lonewolf + Class Cannon + 7 Speed ( 5 + 2 Equipment ) -> 18 Ap per Round - 6 Ap for Invisibility I can cast 2 Spells and cast Invisibility. Enemies cant do anything against it -> win.
But same can be achieved by Rogue: Invisibility ( long CD ) -> go into Stealth somewhere where Enemies cant see you. Wait for Invisibility to be Ready again -> go in -> Invisibility and repeat.
Wow, I didn't even know you could get invisibility down to a 1 turn CD. Who the hell balanced this game? I'd advise him not to quit his day job.