Multi Output Custom Options

I have an explicit setup that i cannot do with my cortex.

Grid 1 → Grid 3 = full guitar ( grid 3 as multi out)
Grid 4 = guitar without cab ( send 1/2)
Grid 2 = all my vocal chain ( output 2)

Now what happens is output 1/2 has both guitar and vocal lines and sucks at live performance. I cannot separate them.

Cant the multi out option detect if the output is already used? And not use it?

Or atleast let us define what we want as outputs.

For example

Output 1 = vocal FOH
Output 2 = guitar FOH

3/4 = guitar MONITOR
SEND 1/2 = amps (stripped of cab block)

Atleast this one?…

Qc is perfect but i guess they did not expect people who will want multi output routes