I think I understand the question.
Catts don't do well with S/H. They get root rot very easily from this method.
Most Oncidiums and the Alliance can handle this. There are a few that can't. I've heard that Onc. Twinkle is one that is a no no for this. I have my Mtssa. Shelob in S/H and it's doing very well.
Phals seem to like this method. Also Neofinetias have been done in S/H as well. (My original Neos were in S/H and did really well. Until the "cleansing" from my daughter.
)
The best way to try this method is to get a plant that you know can handle it or a cheapy NoID and experiment.
