I got the master volume and rig volume concept. I noted that I'm using the master volume knob to increase or decrease my stage volume (monitor) so it is not linked to the FOH volume. I noted the main volume which is under the system settings where you can link and unlink monitor etc. I have decreased that because my overall level going to the FOH was a little hot so it was lowered.
The question is what will make the output clip?
I've tried clean/dist and it seems to not matter. I did notice the clipping goes away for the most part if I'm not plugged into the monitor out.