Just Molo'd this bad boy (Me + my Merc). At this moment, I'm an 81 mage. I had to burn Staunch Recovery AA and also use a single Mana potion but I got the job done. He started casting spells or something from like 50% down to like 10% because I didn't need to heal my pet for that time but he stayed on it. He hit for somewhere over 1300 I think, not sure though I was out of melee range for most of it.
He had a ton of HP, long fight. But that was fun!!! He dropped a lot of stuff, like 4 spells the fabled cloak, the normal cloak, 2 weapons, a diamond and a couple of scales.