I'd have to find a way to let Remus best him somehow, though I think the interesting thing then would be the cost of that...

I would definitely read that, although I already read everything you write. Your take on Greyback's retribution for Remus besting him would be fascinating. As the adage goes, if the devil's in the details, he was right there to greet Remus when he arrived at Hogwarts in DH. I'm really not cruel, I just didn't take it as hard when so many of my favorite characters got spent, lol.

(especially as I was imagining Sirius/OC and 'bath' at the time, no idea why;))

Just wrote a drabble with Lily and Sirius in the bath. Kind of. Maybe that's what you mapped on to? ;)