i can not say this is 100% certain, but since you have to start the fight with hitting him with the blade, and it then disappears, that would sugest it dont work if someone ells in group attack it, before someone that use the blade attacks it, wich then sugest that if you arent first to hit it and your blade disappears with that then you DONT get the item =))
or in short i do NOT think you get 4 items since its the first hit that determens if the mob drops something or not =))
I killed him with a war druid and ench multi-boxing with the assistance of another druid. So 4 characters total. He wasn't that hard. My druids max CH is 5990 and druids can't crit on complete heals. He's magic resistant, but with my slow stick it wasn't to bad. First slow I casted 8 times before it landed. I don't have the 69 spell slow yet, I really hate farming mpg. It was a long fight. Defensive popped before I finished. I'm certain I could have done it without the assistance of my friend. He didn't drop anything. I guess I gotta be up to this part first before killing him.
Killed this guy today thinking yay gonna progress me some but when the fight was over all he dropped was a Stupid Rock =/. so dunno what the drop rate is for what we need but this is lame
Bit of info.. his max hit on me as a druid was 1781.. lots around 1k tho. Not snareable, is slowable.. normal resist, buttload of hp.. overall not too hard, definitely one groupable.
Not sure on respawn, just killed him so will monitor it for guild and post here when i find out