Phals, for example?
I recently mounted a Vandofinetia blaupunkt on a big piece of bark but didn't use moss (did not know you had to) It is in a sunny window, I soak it every day (and my other mounted orchid, Panisea albidiflora, which came that way on a mass of twigs with a little sphagnum. It's a mini and has not grown much since last year--probably not enough humidity.) I guess i should add moss to keep roots humid.
What do the experts say?