Saving Pachara Delight seedling!

[ThisIsPhoenix]

About 4 weeks ago I received an order of 6 different vandas, all of which arrived dry root. I started them all off in vase culture, but because of their tiny size they weren't holding in any humidity. Last week, school started back up and because of this I was also struggling to give them enough water. Reading somewhere that you could pot them loosely with large wood chips I attempted this, hoping it would help with my watering regimen. Today I desided I would check the roots to make sure they were doing good in medium, and to my dismay most of them had spots of completely dry or rotting roots. I have already trimmed and treated them as necessary, but some concerns have arisen about the Pachara Delight's status. While all the others had enough roots that trimming them back didn't hurt their root mass too much, the P. Delight only has two very short roots left, neither of which look to be in the best shape (slightly brown/black, but still greenish and firm).

What I really need to know is what would be the best way to treat it. I know spag n bag is a good option, however the one time I tried it (on a phal) it didn't work. With the same phal though, I tried water culture as a last ditch effort and it worked/is working (still in rehab). I'm desperate to save this orchid and need any help or advice I can get.