Right now I'm running a Fighter-Mage Outlander that focuses on weapon-shield, poison, and summons. Archer, Assassin, Blighted One, Druid, Monk, Prophet and Psion classes for use with or without the SynergiesMod. SynergiesMOD is a full conversion mod for Torchlight 2, adding alternative leveling.
go with an elemental staff and spend most points on focus to build up that.