I've been fluttering around the satyr isles for a little while now and I've not been able to find any abominations bearing this title in name or class description. I've killed a few types of abominations to see if perhaps they would count and the quest text was potentially outdated, but no dice.
Am I looking in the wrong place or am I just missing the spawns? I've been to all four islands and so far haven't found anything that works for raising the abomination kill count.