Yes, I read it while trying to find ways to make blood magic practical. It was either a sabbath, which is expensive, a massive empowerment, which is even more expensive, or the communion-sabbath blend. Then I read his guide, and got the idea of not leaving the slaves just as sitting ducks.
I´m having problems, through. First, they have an annoying tendence not to stay still without spellcasting. Or follow my mind burner script. (I know they can cast it, because at one event I did see one cast a communion master spell spontaneously, which means he did get the path increase).
In fact, not only do they spend valuable fatigue, but they tend to blink around. Into hydra´s poison clouds, particularily.
I´m suffering some attrition (or rather, a lot of attrition) due to this.
And what´s worse, a lucky magic arrow (as in the spell of "Suddenly, an arrow came from the sky aimed at X´s heart) and killed Kirke/Circe, who was vital with her affliction healing ability
No matter. I can still achieve my military objetives. I´ll just need to sacrifice more virgins to do it....MWAHAHAHAHAHA... (I love blood magic)