for me:
-Do you bounce your mix, compress it, and then put it on a separate track or do you do bus it?
Its always running real time in the mix. So its bussed.
-If you bus it, then what do you bus? All of it? Or everything without reverbs and delays?
I parallel compress drums all the time. I usually send the whole kit. I moderate the compression so that the cymbals don't get out of control on the wrong song.
I compress reverbs often.
But it sounds like you are talking about the entire mix here. I do parallel compress the entire mix in the master chain by using a compressor like "The Glue" by Cytomic that has a mix knob. But if I am compressing in the master chain I only do 1-3 dB anyways, so usually don't bother with mixing less than 100% compressor.
-Pre or post fader? Mono even?
Always sent post fader which means I have to readjust compression later in the mix - but for drums I have two sub mix busses going - one straight and one smashed and then I mix between those two and can automate either or both so that the chorus has more of the feel of the drums killing the drums if needed.
If I want to gate a verb - I usually send pre-fader and then compress the reverb send and gate it which makes it easier to have it trigger reliably.
I sometimes use Mono parallel comp on drums on the snare and kick - but usually I would use a UAD 1776 A sometimes just on the input setting with no actual compression so it just adds grit.