I'm using a dual poison setup. Main hand is 14 damage per turn for 8 turns, upgraded to give 10 extra def (I have 94 total). It requires 21 action points but I'm using backstab to bypass it. Second hand is poison with 9 damage for 8 turns, requiring only 11 action points.
Basically I can get backstab, then use action points to use secondary poison. This makes it 23 damage per turn for 8 turns. The poison is unblockable by defense, and can be cast many times due to low cost.
Is it overpowered or does every class have a setup similar to this?