Hmm, that's a tough one. On the plus side, the general type of paph you have, which we usually refer to as maudiae type, is one of the more resilient and easy to grow groups. On the minus side, that plant is unfortunately pretty far gone. Certainly not beyond hope, but it's going to take some TLC & L (the extra L is for luck) to recover.
Overall, I'd say, if you're successful with phals, you'd likely be successful with this plant if it were in good health. They more or less enjoy similar conditions in terms of light levels, temperatures, watering routine, and potting mixes.
In terms of recovery, you'll probably want to keep it a tad shadier than your phals right now. Putting it into some fresh mix might also help rejuvenate it. For the time being, if you can increase the humidity a bit, and allow the mix to approach dryness between watering, that would help. Also, if you happen to have some Superthrive or seaweed extract, it certainly wouldn't hurt to give the plant a little boost. Hold off on fertilizing otherwise for the foreseeable future. The plant is weak, it's likely not got much of a root system, so your average fertilizer is more likely to do more harm than good.
And good luck. If the plant doesn't make it, don't despair, you're definitely facing an uphill battle, and even the best growers would probably have trouble getting something like that to flourish.
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