I am having alot of luck with my dk as archer. I have a shadow bow with 50-150 damage so he can carve most things up before they get close. And he can take care of all those blody cowards who dont want to stand and fight against my hero with a sharpened axe and a shield. Lightningstorm seems like a very good spell too because you can use it against enemies in other rooms. Very useful in the battlefield anyway. Though I am more for a archer because I dont want to spend a million potions.