I win the game on Beginner dificult.I think the final boss was too easy.(My strategy was:when he had my dark clones,i already was with something like 500% damage.I used the Thunder Storm and kill all.The boss killed my mage twice,but i resurrect him.When I was 175% damage,I used incinerate and the ¨&* died).
My strategy:use 3 clerics and 1 mage.Use the skill that give more power in the mage,and the mage use thunder storm.Another combo is use invisibility and area heal.