I had more trouble with Blackthorn or whatever the elite ravager's name was. Lost one on that one.

With Arazzius, I just went to the top of the ramp, did my spreadout macro, 5 ToW, 4 healing, 1 mana, and EM+CL opener. Right after opener I dropped 5 grounding when I saw he was casting Pyro. After that it was LB LB LB until CL was cooled down then repeat. I figured since he was elite, he would be immune to interrupts so I never ES, but when he came in range, 5 Flame Shocks finished him off. Didn't have to heal during fight, but I was below 1/2 health on all 5 by the time the infernals died.

Edit: I was 60 doing the ravager, and I believe 61 when I did Arazzius.