One minor quible here.
I would have liked the succubi to be a bit more... I dunno, I guess more Sensual. A little softer.
As it is now, they work as a good "You done fucked up REAL bad" style end but I'd have liked them to be a bit more "Loving mistress" than straight out "tough-as-nails bitch".
If you do eventually incorporate a "Multi-Succubi Makeover" scene, please keep this in mind.
Still,
very good stuff so far. I look forward to the next release