Hey SC, thanks for the link, this (as I understand it) is not what Dante does or most of posts that say they use 4CM do (@ Dante, please correct me if I'm wrong), I asked the question ages ago (I'd never heard of it so asked what's 4CM), the answer was what I descibed below, not what is in the article (which makes more sense, basically inserting your guitar preamp into various parts of the multi FX). So your MP1/2 becomes an inserted stomp box/distortion pedal but you can move that around in the signal chain.
I simplified the whole thing right from the start and used a small desk and run it like I run any PA combining FX via the aux/FX sends. Wah is probably the only thing I'd want before tube stage (which is how the MP2 signal chain works), back in MP1 days, I didn't need/want wah so it wasn't an issue, I rarely use it these days, but if you want wah, IMHO it's better before the gain stage (tube or SS).