Display Morenot as far as I can see. Thar would rewuire you to send the signal through the Kemper twice (once early in the chain for preamp and FX then at the end chain for the cab sim. The Kemper only has one set of connections for routing signal flow. In your scensrio the Loadbox would also supply the cab IR and this the signal that would go to FOH.
However, if you want to run this sort of hybrid system there are probably better solutions available for less money.
Can I ask WHY you want to go through all this trouble and expense trying to build a hybrid rig?
What do you think xoect it to add that you can’t get any other way?
Maybe I’m just being dumb and missing something really obvious but I cannot think od a single advantage but at least half a dozen disadvantages spring to mind instantly.
I know I'm looking for trouble The main reason is that when I'm in a situation that allows me to use the Archon with the cab I don't want to give up and use the Kemper.
I already know that I'll use the Kemper most of the time because it's more practical and functional in every way, but as I said for some special and big situations I'd like to be able to use my real rig. So I thought that I could find a way to integrate the Kemper in this situation as a effects unit. I wanted to have the real sound on stage with the Kemper as effects unit and also I wanted to use its cab sim skills so I don't have to mic the cab on stage. In this way I just have thought to get the best of both worlds...