I don't know if there is any answer to your question.
I like to be a warrior and i played the game in the hardcore mode with 2 warriors (Hero + DK) without great difficulties.
But i am very bad playing a mage or a survivor.

I know other members who beated easyly the game being a mage or a survivor.

I thought that the game is good for playing the 3 characters but the results depends on the gamer himself.

Barta