[Sombre]

It clearly isn't going to help you win the game - it's simply too ineffective. But it can be fun and it is doable. Couple of things I'd like to add:

1. If you're using Conceptual Balance Mod, the blood fountain generates two blood slaves per turn. If you take him awake and blood hunt with him as well, this mounts up.

2. Bloodhunting your cap isn't actually that bad an idea if you have something like freespawn patrollers. You can also use call of the winds and similar spells to produce very effective patrollers for relatively little cost. With a nice little patrol force you can keep taxes at 100 and bloodhunt quite a bit. You lose your pop, so in the long run it's bad for you, but then again in the long run you're going for a blood economy which won't need much in terms of gold, resources etc and will be able to take more provinces to blood hunt as it rolls along.

Call of the winds also nets you a flying commander who can nip about scooping up harvested blood slaves and winging back to a lab.