Oh he was most certainly doable with me tanking. Had 3 clerics total, 2 healing the tank, 1 healing the rampage tank. Our problem was that rampage was killing our second tank, and dps one by one. Figured out that we needed to stick a cleric on dedicating heals to ramp tank only.
Mazzic, the other tank, however, seemed to take considerably higher damage according to our clerics. Almost night and day comparison. I wish I had a parse of his damage, but I don't. He tanked for considerably less time than I did, so it wouldn't be a straight comparison.
All-in-all, it was a fun fight, very challenging for us, but a great victory.