I'm not a senior member, however I've been growing for about two years now and have learned a few things. Plus I saw that there were many views, but no help.
I'll assume the plant was from a big box store, which are often cared for improperly & sometimes doomed from the start. Your's looks like it may make it however. I would first remove all the dead roots and repot in some new Phal mix, in possibly a orchid pot for better ait circulation and draining. I don't have very good luck with the solid plastic pots. It looks like the current bark is very dry so watering frequency and humidity should probably be increased. You can use the skewer method to test the moisture in the potting mix. I never let mine completely dry out, but avoid "wet feet". Give it some light and some time and I think she'll be fine.