Healthy Paphs are not easy to overwater to the point of root rot unless the old medium is very decayed. I don't remove old roots because I can't tell which are dead. I would stop the misting. Orchids don't absorb water through the leaves, and misting promotes fungus.
Edit: After seeing your photos again, the plants themselves look too good to have been sitting on top of dead roots. What did you see that made you unpot them and cut off the roots? What did the roots look like?
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I keep all my Paphs in a bark mix, but have had the best luck using sphagnum to recover those that have had root rot. If you have it, an overnight soak in a root stimulant like Kelpmax may be helpful. Then repot into sphagnum with an air gap at the bottom: you can use styrofoam peanuts to keep the gap. Put the whole pot and plant in clear container or plastic bag with some holes for ventilation. Put it in a spot with bright light but no direct sun. Water whenever the moss feels slightly damp/ almost dry. Be patient: it took months for mine to start pushing new roots. Avoid the temptation to unpot and look for signs of recovery. Good luck!
Last edited by aliceinwl; 01-17-2021 at 11:49 PM..