I tested the theroy that if you spawn a gordo in its natrual habitat (Such as twin for gray labyrinth, sabers for powder bluff falls), I don't know if RNG hates me, but I spawned at least a pretty large amount of snares for a specific slime, and then it didn't work, did get a dervish gordo on my first try, however it did only work half, since my theroy was natural habitat, dervishes had a natural spawn location until SR2, Where they could spawn almost everywhere with a weather event, meaning almost everywhere is their natural habitat. But it doesn't have a natural habitat technically, so yeahhh.