Weapon: Dreamers Darkbolt Blaster.
Chest: LvL 14 Dreamers Nature Robe of Mastery.
Head: Wizards Sorcery Cap.

Go enough int for the cap then the restin dex.

Sadly I can't remember my build But I'd say:

5/5 Heal
2/5 Single Target Freeze
5/5 Fire Blast
5/5 Lightning
1/5 Mana Shield