Agree with @victoria on Janevris/Janerezi/Janevrisrezi. There's so much to say about the way all three of them strive to live up to deeply toxic ideals- Terezi as a legislacerator, Vriska living up to Mindfang, Jane trying to be the heiress the Condesce wanted. Vriska and Jane, in particular, have a lot to say about sexual trauma and grooming and how that cycle can spill out onto other people, and the guilt that comes with it.

Another very rarepair of mine is Rose/Calliope. I read a really good fic that was written in the style of an old school fandom_wank report about them and I LOVED it.