dropped a bow for me tonight as well. will edit post when i figure out what the bow is (someone's alt looted it).
three boxed him using a 67 cleric healing a 17k paladin and an enchanter. no surprises, except if you're fighting him up top where he spawns instead of pulling him, beware of high priest preyan, who roams along that top part of the arena. if he's up, i'd advise killing preyan first. if preyan's ph is up and you have an enchanter, you should be ok mesmerizing the add if it happens to roam by during the fight.
edit 1: ok there was one surprise. after he was debuffed, he began reflecting spells. not a big deal since my dps was almost completely via paladin melee. but this would be an issue with a caster heavy group.