pippopluto A PS6 would not complicate your set up. It could placed be in the FX loop, and controlled by turning the loop on/off, and could fit in a rack or the cubby in the back of a non-powered toaster.
That's a great idea for an easy workaround. But let me say: the harmonizer-features of the Kemper are excellent, so I would not like to have another unit in my rig. I prefer ALL IN ONE to minimize troubles on stage!