Huge Set Back for Noid Phal

[Im Just Saying]

After this you all may want to revoke my orchid grower card... I'm so ashamed to say this but my no ID phal has taken a turn for the worst. While waiting on the spent spike to die back I noticed that the browning seem to accelerate over the last couple of days. Upon inspection I saw a gnat of some kind on the phal which led me to inspect it much closer where I noticed pitting on the underside of one of the leaves. Immediately I lifted it out of the decorative vase an looked at the roots... my heart started to sink. A couple of the roots that looked fine a week ago were either browning or had collapsed completely. I knew that I was dealing with root rot again.

I prepped the bark, made a new smaller pot out of a clear plastic solo cup, dug up the recipe for the cinnamon and dish soap recipe last night thinking I will re-pot today. I just took the phal out of the pot shook the bark off and felt a rock hit the bottom of my stomach. Almost all of the roots in the bark mix have rotted out with the exception of a couple. With that being said almost all of the "aerial" roots are intact, some have even gotten fatter and it looks like there has been some growth in the length of some.

Herein lies my questions.

How long should I soak the aerial roots to get them more pliable to anchor some into the medium?

I want to get some sort of root hormone to apply prior to re-pot however it will be Saturday before I can get to the store. If I wrap the roots in damp paper towels and occasionally mist can I leave the plant out of any medium for a little over a day?

I am thinking that this new makeshift pot is still too big, I don't have any packing peanuts however I do have some packaging Styrofoam from an item I purchased. Can I break this up into pieces and add to the pot when I re-pot?

Thanks sooo much for your help, if it wasn't for the fact that my newer phals in sphag are doing fine I would feel like a complete failure.