What cab sim do you use?
I'm doing somewhat similar, but I use my pod hd500x fully for manual stompbox mode. No amp simulation, effects only.
Currently my route is:
Guitar - Hd500x - front input of amp - use as a monitor
For FOH
I take cable out from "pre amp out" of my amp direct to FOH
So the part for FOH does not pass any cab simulator
What do you think?