Just took my 45 Barbarian and tier 5 apprentice healer down to camp for the sash. Had to wait a few days on limited playing time but finally he popped and I pulled the 3 mobs (no problem with mercenary healer). The frenzied ghoul was hitting faster then other mobs but I wanted to kill the wizard first.
Then all of a sudden the mobs turned into a diseased mob of some sort... Looted something after the kill that was a no drop disease spore or something along those lines... Highly disappointed since it seems to change their loot table... The problem was the wizard (i think) since he was the one with the diseased spore but the frenzied ghoul had it two after they transformed.
Just my luck.
Will try again but it sucks to have their loot table change in the middle of a fight.