I really shouldn't be up for any more challenges until past July. But.
I think something completely different would be best? Maybe something like no_true_pair, but with some kind of requester agency?
...*tries to figure out how that would work*
Okay, something like, everyone comes up with a set of characters and a set of kinks. Maybe multiple sets of characters. Maybe those are collected and posted all together anonymously. Then people make requests combining the characters and the kinks however they like! ... and then maybe all the prompts are posted in a big pile for people to claim from, kinkfest-style, so you're not limited to only the ones generated from your lists.