I suggest light, max your third spell the insta-cast one since you can spam and more hits = more chance to crit and the stone wall? Not sure on the name, it's the one where you get like x layers that protect you from damage, which will be really useful since the light spell has like a two meters range so the mobs will hit you.
Talents, idk, I'd say take whatever you think that's useful for your style of play, or check the forums maybe? Experimenting is the best way to learn, and if you mess up real hard you can always reset them, it costs RL money tho

EDIT: ZIT =
I'm completely sad and confused about dis place.