It just occurred to me that how they are proposing to use Succubi reminds me of how Pathfinder used Kytons, making them thier own Cenobite like race by mixing traditional Kyton devil lore, with the Shadow Plane, and influnces from the Cenibites and mad scientist/self surgery horror stories, to make a really cool race of fiends.
http://www.d20pfsrd.com/bestiary/monster-listings/outsiders/kyton
So the Bi branch off, which opens up the possiblities of Succubi subraces, and even a Tiefling subrace descended from Succubi, seperate from those descended from the Hells or the Abyss.
http://www.d20pfsrd.com/bestiary/monster-listings/outsiders/kyton
So the Bi branch off, which opens up the possiblities of Succubi subraces, and even a Tiefling subrace descended from Succubi, seperate from those descended from the Hells or the Abyss.