Sedoretu exchange

I do a lot of exchanges in fall/winter, and I love all of them, but I just learned about another one that I might have to do instead of one of them. There is an exchange entirely dedicated to sedoretus, that weird 4-person poly marriage LeGuin came up with. And I love Sedoretu stories. It's called sedoretuex and it runs from now through December (currently in nominations). If I do it, I would have to give up doing startrekholidays, which I've done the last several years and really enjoyed.

My problem is that there are a number of ships I have where there are THREE characters, but nobody to really slot in for the fourth. For example, Lando/Mara/Luke and then who would you put in for the fourth? There are a dearth of women in the Legends universe, even fewer in the OT, and most of the ones who exist are already paired up. I don't want to break up Han/Leia, or Corran/Mirax. Then with Babylon 5, I love the idea of Delenn/John/Lennier and Delenn/John/Neroon, but then who to put in as a fourth? Mayal? Susan?

And you know, there aren't that many possible sedoretus in most of my fandoms. I'm used to offering, like, ten different characters/pairing in a lot of my fandoms because they tend to have large casts and I love them all. But most of them, I'm going through, and there's like one possible sedoretu.

I do love the concept of sedoretus.

But I also love startrekholidays