Bitty: You'd think it'd be other succubi/incubi, right? Wrong. For all of the skill and fun, we end up draining each other, which is a drag. Honestly tho, variety is the frosting on the cake of life... mmm, frosting... But here are some of the ones I like and why (in no particular order)
Devils/Tieflings (non succubi/incubi) - Fiendish vigor
Goblins - Sheer Numbers
Orcs - Relentless Endurance
Dragonborn - They make magic with their mouths
Humans -
...come to think of it I haven't been out that long, I need some more test subjects!