I've played all the dark souls games, but I hate trying a boss a few times in bloodborne only to have to stop and go farm blood vials, just makes me not want to start it back up again. I love it otherwise, this is my 3rd attempt and getting through it, and I'm thinking about starting it back up where I was at, but I know I got about 20 mins of blood vial farming before I should bother tackling the boss I'm on.