:) Yeah. I've edited videos for 7 years, but always just one feed. Editing multiple feeds is new and I'm really surprised at how much longer it takes. I've tried to find a way to not breath into the microphone while talking, but no matter how I position my headset (I use this https://www.amazon.com/gp/product/B00IVPG0SW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) the breathing is picked up and sure enough I keep on breathing annoyingly when others are talking. It's not an issue when I'm talking, which is why I've never noticed the issue before since I'm used to using the blade tool to chop out all the areas where I talk.
Also, in the waveforms its so hard to tell a "yep" vs a heavy breath, a sigh, or some sort of desk sound. I guess I was overly hopeful that there'd be some insider trick.
I find the best way to get separate feeds for voice and instrument is to use a headset microphone (something like this https://www.amazon.com/gp/product/B00IVPG0SW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) for voice and then a separate mic for the instrument. Very little instrument bleeds into the headset mic so you can adjust them separately. Simpler than trying to compress/process, etc.
YMMV