Vanheim and blood

[Bowlingballhead]

While we're on the subject of blood (and what a wonderful subject it is) I've really been trying to learn to like Mictlan, but their dependence on sacrifice leads me to one inevitable question:

Can priests sacrifice out of the laboratory pool, or do they have to have their victims in their personal inventory?

If the latter, can we BEG Illwinter to fix that in the next patch? I was under the impression priests had to carry their sacrifice supply, and keeping them 'topped up' and tracking their usage is a massive and annoying drain on time and attention. I'd sacrifice much more if I could just turn the command on and forget it. Indeed, my temples would run red with blood!