I just killed him 5 minutes ago with 5x61 shamans. 5xToW, 5xGrounding, 4xHealing 1xMana. Started with EM+CL, then LB+ES. He was down to 50% when he got to me. Then it's just burning him down before he kills one of the shamans. Didn't even notice any adds spawn, guess I had some lucky timed Earth shocks.

I found the fight very easy.