Xu-Fu can scan this section for the most suitable strategies according to your preferences and show the required pets.
Depending on the amount of fights in the section, this can take up to a minute to process.
Gorgemouth (and others) are the ones you kill for the world quests. All of them are significantly less difficult than the 10 pets you kill for the Abhorrent Adversaries achievement. (None of these 10 can be a WQ to my knowledge)