what if i used the H90 in dual mode as you suggested with my switcher,

but in addition to that i wanted to use it for vocal fx in some patches.

what would be the required connections/setup for that be

for example. patch 1 could use 1 path for vocals and one for guitar

patch 2 would use 2 paths for guitar

patch 3 would use 2 paths for vocals

etc etc….