Trying to make a milkdrow farm, not for maximal production output, but maximum daily mana. I caught them all in one day, tried to get them all in one forced session so they could become Sex-Crazed asap. The amount of turns it took to subdue and rope each one left not enough turns to make them cum once, even with one girl who didn't need to be forced. A slave grade should love the opportunity to tie up noble and rich captives, but unfortunately she was no help. When I split them into two groups, I could start generating orgasms with her while tormenting the rest. 1 willing + 5 unwilling generated as much mana as a consenting foursome, and a few had Pervert, Masochist or Likes it Rough when finished.
Now I'm taking two at a time for breaking in and sending to nympho training. Some had to be downgraded, but it's all going on schedule. Because I put them back on the farm before they go, they continue producing output, so the total costs are paying for themselves.