Saving phal with no roots.

[Rafal]

Hello everyone

Names Rafal first time writer.

Orchids started fascinating in the last month or so. Mostly because my mom has about 10 phals with most of them in good health. I have started to take care of one phal previous to this one with some root rot and it hasn't bloomed in years. Reported and is currently growing a health leaf.
So not very much experience but lots of reading.
My mom brought home 3 phals from a customers garbage pile in the front yard with the life sucked out of them. First I convinced my mom to repot them right away, two were ok with a few roots left but the third one after surgery had no roots left and I also cut part of the stem off because of the rot. It has been some time now since repotting and I am seeing progress. We have one small leaf and what looks like another one just starting to poke his head out of the centre.
I have read about water culture and was thing of trying it but since I have been seeing growth I don't want to move the plant while it's making progress.
As you will see in the pictures 2 bigger leaves are completely withered with a small one withered about half way. That was from the previous owner.
I'm not too sure what to do with the withered leaves let them be for now?
I have been trying to keep the sphagnum moss as damp as it could be without overwatering.
Will it eventually sprout roots or is there a way to help it out? Am I doing enough?
Anyway I would like to say long story short but it has been going on for a bit now so any advice is welcome.
Ohhh one last thing since I would think humidity is key what I have been doing once in a while is putting the plastic pot in the sunlight for a few minutes and you start to see the pot condensate on the inside then I take it out of the sun do you think that helps or should I stop.