I'd yank the USB power ports, for starters. In a small rig like this, anything you can do outboard needs to be done outboard. This would give 15 hp, so...Xaoc Batumi + Poti = 13 hp, and a Circuit Abbey Twiggy dual ringmod/quadrant multiplier to use both for ring modulation or as a spare VCA or polarizer. That's where I'd go, fwiw...