Update on the Blasphemous remap: I've got the first pass maps done. However, as some content is locked behind NG+, and since I need a plain new game to double-check all the items, it'll require
two more playthroughs (well, more like 1.5 - I don't have to 100% or even finish NG+) to finish the maps, not just one. This is going to take time.
Before I tackle that, I've been detouring and mapping the Miriam challenge rooms. I have three of the five done. I'm not actually sure they're worth mapping, considering that they're isolated rooms and just how
miserable the process is. I guess since regular platformers have single-level maps, these sort of make sense to include. Here's one I did today:

If it wasn't for the developer console mod, I'd not even entertain the idea of doing these. Dying in these timed challenges while invincible stops the timer, so at least I don't have to start over every 1-2 minutes or every time I have to jump into spikes to screenshot a distant corner.
Edit: I've given up on doing the Miriam rooms. I did the first four and hated them, but the fifth broke me completely. I mapped up to the big fireball descent (like 3 mini-rooms away from the end?), but then then the game decided it was done being nice, and invincible mode now makes spike deaths lock the game, and I simply do not have the patience to map this room if I have to redo the entire thing for every 3rd screenshot (I don't even want to
play it normally, nevermind mapping it). I considered reconstructing it based on videos, but those don't visit every part of the room, and it's just not worth the effort IMO.
Edit2: Blinkey finished the fifth challenge room map for me

I've incorporated their map into mine and submitted the set.