When I’m recording multiple mics on guitar I record as a stereo track, or even a quad track type (to include clean DI and pedal FX for potential re-amping later). I then send that channel to multiple stereo groups, one for each individual track. The first plugin in each group would be Mix6to2 which allows you to select only one of the tracks coming in, e.g. left. I’d then blend those groups back down to a final stereo group and apply overall guitar FX.
I find this way of working makes the comping so much easier than using group editing! If you already have mono files, you could render them to stereo and re-import.