I would not reccomend a fire sorc, they have low defense becuase they don't get chilling armor or anyhting, plus a lot of x-tra enemies are immune to fire, like burning dead archers, and demon imps, and a group of burning dead archers will handle yur ass in a flash, but a cold sorc wouldn't be good either, on account the boar enemy things, the kind of enemy eldrtich is, is immune to cold. Light sorc might be a good choice, or a psn nova/bone spirit necro, that could trap enemies with bone prison, and cast psn nova and bone spirit to get the emeies yur psn nova doesn't reach cuz they are to deep in the prison walls.