[BugRoger]

Oh, funny. I havent' seen that formula before. I can confirm it though. When I first started using blood magic I set up a test game to test various strategies.

I usually put my blood hunters in a province with a population arround 5000. Set taxes to 0 and use 1 "Call of the Winds" for every 5 blood hunters. Unrest stays at 0 and I would say that I get at least 5 slaves for each blood hunter on average. I only use mages with at least blood 1 and give them a SDR. Looking at the formula now it makes sense that this strategy is highly effective. I also lose hardly any population and don't have to change the blood hunting province all the time.

I also tried blood hunting by recruiting hordes of cheap commanders without blood magic. It kind of worked as well but it's very hard to keep the unrest under control. Upkeep and logistics are a problem as well. So if I have access to blood mages I wouldn't use the scouts for hunting.

Hope that helps.