Thanks everyone for your replies, I've been trying many builds which I found in these forums, due to the fact that no one seemed to answered my doubts in here. Anyway, I winded up making the following builds:
-Fire storm controller )) really fun, liked it a lot
-gravity emp troller )) gravity powers' animations look funny, I love this build
-Ill time troller )) hard to solo level, takes long to kill enemies ( btw, I'm so sure I messed up pretty bad with this build since I didn't follow any guides, just picked what I thought would suit my gameplay style)
-Elec Elec troller )) fun but felt it wouldn't work well after hitting high levels in this game
- Demon storm MM )) Demons look awe! I feel powerful with this build.
Do you guys have any suggestions?, now I'd like an elec based hero. I think the Fire Storm troller fits perfectly with what I was looking for, and might make an ice storm based one soon.