Think it's by JackofSpikes??

I think that's the author and title is like Angel's Revenge? Buffy gets vamped and tortured by Angelus and Spike and her team up? Dalton is their minion person and I remember they have a mating ritual and Dalton watches and gets off on it. Help, please?

I think you're looking for Revenge For Love by Tasha. You can find it here on SR. The mating is in chapter 3.

THANK YOU