I have noticed that there are no mother or baby spiders in overworld or farmworld, also never seen a cockatrice or support creeper, although they are rare. Do the Barakoa exist? All these are needed for quests and don't seem to spawn. I have spent many hours looking for an Aparist village with no luck, I think the Stargate mod seem to be restricting the other mod villagers from spawning as all I see are the vanilla and Tok'ra villagers. Is there a restriction on breeding villagers too, I have had no luck with them and in 1.12.2 I think all you need is lots of valid doors.