Blood sacrifice - optimisation?

[Skolem]

Another problem, is that most of my turn with mictlan end with 4 or less blood slave on the lab, so the sacrifier cannot replenish. I first have to "shift Z" all my bood hunters, then found every former sacrifier on the map, then put them enough slave to sacrifice, and the click the sacrifice commad (AFAIK there is no shortcut ). And I don't think I'm the only one who use all his slave in most of his turns, so there still is a lot of micromanagement (most of it is to found the commanders you want).