Nice idea – pulling stems out live gives you a whole new palette. Try isolating the vocal onstage and looping it in real time, then layering a synth line that reacts to the vocal pitch. Or cut the drums in half and feed one side into a delay, the other into a low‑pass filter that you can automate on the fly. The key is keeping latency minimal; a bad delay can kill the groove. If you can set up a quick backup mix for when the tech hiccups, you’ll feel more comfortable. Give it a run-through before the show and tweak the thresholds until it feels tight.

Good plan—keep it tight, stay calm, and you’ll nail that live mix. Let me know how the rehearsal goes.