I just did the brunt work of killing a shadowlord in Moonglow. I cast armageddon on it three times, dealing 25k, 12k and finally 7k points of damage. Yet, just because I die and have to leave to resurrect and then come back in as it's being finished off, I get no cloak and not even looting rights to the corpse. Three pieces of blackrock, four or five deaths and the bulk or the work for three other people to get cloaks. Great drop system.