So I was reading through your derpbent lore stuff, and spent a few minutes figuring out what everyone's titles are, and it occurred to me that Karkat is the Rogue of Void - Roxy's title. I'm not particularly fussed, I'm just wondering if you've noticed or if you care.
I noticed, but I’d decided he was the Rogue of Void like 9 months ago as well as what he could do with that title. Holy shit this AU is old. I think most of what he is actually good for is crawling around in small spaces such as an overhead air duct, which I believe is a Rogueish sort of thing to do, and he is hidden in that case, so it is also a Voidy thing to do. Much like Sollux, who is the Thief and may be used like a pipecleaner to achieve similar results in small cramped spaces.
Feferi as the Mage of Light may also be very similar to Rose because I think the Mage is probably the active counterpart to the Seer class.
If it turns out Rogue is a female-only class and they wear overtly feminine clothes I will also still use the proper cut, I literally could not care less about the gender barriers (see: this).