Faith's actually got us covered there. She says she's got some blood stocked up. Which is no less creepy to type as it was to read.
As far as weapons go, I've got my gunblade. And some magic stored up, but it's a little on the flashy side, so we should save that for a last resort. Other than that I'm thinking anything with a blade. Also maybe a tranq gun, with darts that we can drain and fill up with the blood.