1) Krita 3.2 now supports new version, so I have to use Krita 3.2 as a bridge.
2) It seems I have to copy merge and then paste to get what I want.
3) In Krita, you have to index based on colors extracted from instanced layer using nondestructive editing if you want more than 16 colors if you really want specific color. On the plus side, you can get a better Grafx2 if you can figure this out. The reason I say this is because one can paint, and generate pixel art as if they're using grafx2 snd photoshop hybrid. I am solving this, and thing is that I have to find out how to apply alpha based on rule. GIMP and Krita G'MIC works the exact same way.