I had been juuust about to order an Atomic for my FRFR rig, when I had an idea.
I need something for my vDrums to play through for jamming, and I need an FRFR setup so that I can "decouple" my roadster from my Axe-Fx.
My thought right now is that a 1221 + small 4-channel mixer would give me the ability to jam with my Axe-Fx, vDrums, a bass DI and a vocalist, all in one package.
Any reason I shouldn't pull the trigger on this vs the Atomic? They both sort of do the same thing, and it seems like this is the best bang for the buck since it has the ability to get loud as hell if I ever want to drag it out and play some small acoustic gigs with some buddies.
The Mackie sounds ideal for what you want to use it for. Go for it.