Solo'd as a 70 mage with 9.5k health and over 1k frost dmg. Had the whole area before him cleared for running room including the gateway with the bugs. Put pet on him first. Trinket for extra dmg. While he's hitting pet I'm getting in unterrupted nukes. Iceblock if I pull aggro. Cold snap. Second pet while I start to kite. I just run back and icelance, fireblast, CoC blink. Ice Block to put him back on pet. After that it's just keep moving. Put up ice barrier when you can't get away. Health pot as necessary. The key is to get hit as little as possible obviously. Having Boar's Speed or Minor Speed on your boots helps a lot.