I'm not sure what the advantage would be to using the patch bay between the instruments and the mixer. You could just as easily have an XLR snake into the mixer and put the instruments into whatever input you like right there.

I use a patch bay primarily so I can assign compressors to different channel inserts. My secondary usage is to allow me to patch the compressors before or after the split to the multitrack feed. If I wanted to I could route mixer channels to different multitrack inputs, but that's kind of pointless since I can do that routing in the DAW. If I were recording to tape it might be handy.

i'd get a short 8 channel stage box for the mic inputs. easy swap when you want. it's a bad idea to have mic inputs in a line in out patch bay.

For mics you use XLRs. A few people use patch bays at mic level, but it's rare to see them in studios or broadcast working on jacks in either bantam or ¼" types. Patch bays need maintenance with burnishers and contact cleaner and 48v phantom seems to encourage this. I've had mic patch bays in two studios and they were in the main ok, but crackles and pops were worse than on the line level bays. I've used 1u xlr panels in my later studios and they are trouble free because XLRs self-wipe, which normalling jack sockets don't. So for me, patch bays are for line, xlr panels for mics,mandy the downside is no normalling. We tend to route in software anyway now for our inputs. I'm just building a new studio, and there are no patch bays at all.

Don't patch mics on a patchbay, when fantom power is needed in the future it gets tricky!!!!! Use as said a stagebox for xlr/mic/di's........