Finally, at 73/74 I downed him last night. The reward was such an upgrade that I immediately left the instance to go turn in.

What I had been trying was to stop my shammies back and drop all my totems before I aggroed, even tho that didn't work half the time, he'd aggro anyways and I'd be starting a fight I wasn't ready for. Instead, I ran all right up to him and started tanking as I dropped my totems (took some creative finger work since my totems are on my G keys on my G15 keyboard, and my tanking macro is the ` key, and heals are F1 )

First adds/tomb I dropped 4 fire novas, second adds/tomb I thunderstormed, and followed that pattern, healing and chain lightning when I could.

After the first fire novas went off, I dropped 4x fire eles. After that it was cake, with the fire eles taking the adds and tombs.