Lots of hps. 80k+ I'd estimate, warrior defensive ran out on him around 15% in a group last night. 65 war, 65 druid, 62 nec (myself), 59 war, 59 enc, 56 cleric. Enchanter was able to slow him, don't recall if he tashed first. DS was annoying, but not horrible. Only dropped the 59 war about 25% from the DS for the whole fight, and dropped my pet about 50% before enrage (so pet took about 1500dmg over 3 minutes from DS).
Dropped nothing for us, stingy *******. Was a fairly unexpectedly fun fight though.