Life Gain + Voltron.
Fighting enemy minions with Battlemage comes with the downside of taking that damage directly. So the hope here is to counterbalance that risk with life gain, and buy time to stack more equipment on the avatar until he's buff enough to close the game out.
/ on a vampire for a sweep + life recuperation.
/ for stalling tactics.
The usual cast of equipment for putting on Battlemage. , are especially good with him, since he wants kill credit for his ability anyway.
(Really wanted to include 
cards like , . But couldn't balance the threshold on 3 elements well, and it didn't seem like there were enough earth cards that would fit to make it worthwhile. Suggestions welcome!)