[Ironhawk]

Equip blood hunters with blood boosters? That doesnt seem like an efficient strategy to me. Best to spend the least amount possible (just giving them a dousing rod) for the highest possible return. Save boosters for whoever your real bloodmage is and use the slaves to summon archdevils or something.

Another reason not to put anything more than you absolutely need on your hunters is because they are so vulnerable. Unless you've madcastled or something, your hunters will generally be spread out all over your empire with minimal protection. A wise player can raid your hunting operations, killing expensive mages and disrupting your blood supply lines.