Oil is one of the only CC's that work through armor. This gives him great buffs from both schools, and high damage combos. This is what I make him most of the time. He has resistances to Poison and Fire and a racial spell that scales with int. Huntsman and geo forTactical Retreat, Dust, and Trap skills.
Aero's teleports, dodge spell, and blinding radiance are useful. Don't consider these to be 'tight' builds. Dipping points here and there for utility is to be expected. It's hard to make 'bad' build, but here are some loose ideas for point allocation. Join up with a friend to play online in co-op and make your own adventures with the powerful RPG toolkit. Gather your party and get ready for a new, back-to-the-roots RPG adventure! Discuss your decisions with companions fight foes in turn-based combat explore an open world and interact with everything and everyone you see. Looking for a Group to play with? Try this thread Discussion Overview.