As for Rekka combo's (safe 50/50's) we will be using
@BarterRaccoon 's combo path with this sequence:
Starter~Rekka, 1,
EX-Grab, NjP, RC, U3, B1, 214~X-Strike.
Does 1% less than the EX-Spin combo, but meterburned Rekka doesn't launch as high as EX Spin, so you can't delay the NjP as much, as such the F134 whiffs everyime on certain characters and the window is really tight for the ones it doesn't, this way is super consistent however.
Unless anyone has someone better to contribute, I think I'm going to update the BnB's