I think I would just try one treatment and then do everything in my power to encourage root growth.
If you don't want to get the Physan, you could try one of the cinnamon recipes on Ray's site. Look under "Free Info" and then "Home made".
If you don't use KLN, then at the very least, I'd get some Super Thrive and most surely Seaweed or Kelp.
There are a lot of people here who have a great deal more experience than I do with "rescue" missions! Perhaps James will pop in and help you.
He's the Orchid Whisperer!