Mix recorded SM57 with IR tracks? Mind on alligning tracks togheter (plugin you can use https://www.forward-audio.de/fatimealign/)
Another, mix two IR tracks with different depth of reverbs on each one and radical volume change. Ex 4x12 with 5% reverb + -15db 2x12 open cab with 2% reverb
All 500k. Im quite jelaus of Ionizers. Already rocking stock D Activators, but they certanly have too much output and must be quite close to strings.
I doubt you can get split without buying another dpt/pushpull/5way switch. If your musicman has 3 way maybe look inside? The colors should be...