Tell me if I get this right.. so if I rush the main quest in ~2-4 days and grab a level 11-13 slave from a random bandit camp before the "sacrifice" quest part, then if I didn't level my "story" slaves there is no chance for them to be selected for it, because the lv11 slave (even if I didn't even touch them aside from capturing them) will have too high of a "score" so it will always get targeted for the "sacrifice" ?
(assuming I get a "story" slave at day one and they stay lv1, I interact with them every day (including sex), they get a score of 4(ownership)+12(sex)+0(win)+7(level)=23 while the random lv11 bandit I just dragged home that day gets 77 just from her level?..)
Looking at the formula it does look like the main target will be your best combat slave if you're not rushing tho..
..by the way, what happens if you reach that part of the quest with either no slaves or all slaves in "away" status ?