Phal in need of assistance

[The Orchidist]

I have decided to take on a phal that had been sitting on a shelf in someones livingroom for 6 mnths but was very neglected and had very little watering ..the plant has 3 sets of leaves ..3 on each side but no signs of any new root growth compared to all my other phals.. question i have is there is a few short roots around the base and only 1 super long root that is still green but in spots the outer protective film looks damaged .. i cant decide if the plant is too stressed because this one root is trying to keep the plant alive or should i cut and trim all of them and start fresh...the leaves are starting to have the curl effect . ..and when i repot should i use small cedar bark medium with abit of spag or use clay pebbles . I would appreciate your comments