[Autumn]

I agree with Nano, its not like you're gaining the skill slots in battle or losing any skills because of it all, its a fair set back for relying on sanguine crest too much.

The other two reasons didn't provide as much as an edge as you'd think, the FP granted from sanguine crest would increase as soon as you got in battle, and your battle weight as well, making it just tools for people to metagame that you are a vampire.