How much humidity for mounts?

[Ordphien]

I think Ill give it a go...
I'm going to go to Trader Joe's and pick up some different NOIDs and try some different mounts...
See what works for me.
I'm not confined to a windowsill... my whole room gets enough light to flower oncidiums and dendrobiums. The brighter half can flowers cattleyas and my actual windowsill burns orchids lol.
My gardenia bonsai is doing well there though.
So I've got a bit of room to play around.

Would a mini catt do well mounted?
I just got a NOID one and wanna see if it will reflower in the darker half of my room with my dendrobiums and oncidiums..
Also... what plants can I mount alongside orchids? Something like a fern?