Haven’t had much time this weekend, but at least I more or less settled with math that I will use for new Wet blending modes! I think… xD
Here are the plotted functions I will use, if somebody likes this kind of stuff, you can check them out. (And moving sliders to see functions animate is kinda fun xD)
Coming days I will add them to Krita make test to be sure about exact parameter values I will want to use, and I will make some pictures for you guys 
Hopefully even AppImage for test (if I will manage to borrow external SSD xD)