Impressive board! Have you tried switching the ins and outs of the H90 to instrument / line level? So that the H90 doesn’t introduce unwanted level changes.

Also, I can relate to this:

i’m kinda struggling with all the possibilities in routing choices for all these sounds in the H90 and all the options for those sounds.

When I first got my H90, I struggled with the exact same thing. So many sounds, so many routing possibilities, but “only” two algorithms at once… I spent more time planning in my head what could be done than using it and actually creating sounds. So my advice would be to focus more on what you wanna do rather than thinking about what could be done in theory. Or, just solve the problem by throwing money at it and get the H9000 😉

Good luck!