Can you not set output rows to the multi out, then set which outputs you want to have cab bypassed? You can also use panning to reduce outputs to just one side as well?
That was my interpretation/plan at least:
- Row 3+4 both set to multi out, cab bypass set on outputs 3/4.
- 1/2 become main FOH outs, 3/4 can go to stage power amp.
I can then pan everything on row 3 one way so that outputs 1+3 are for that row, then do the opposite on row 4 and have that in output 2+4.