I don't really have anything to add to the mechanical discussion here, but as far as writing I could try my hand at a few scene variants.
I'm not really into guro in the sense of outright killing either though, I'm more of a "lethal peril" sort. Bonus points if the victim has at least a slim chance of escape. This sort of thing (non-guro, don't worry). Could be a whole public spectacle, a "trial by perversion" kinda deal, heh. If you're interested I'll see what I can come up with - got at least one idea already ;)