Repotting time! Can't decide on medium for phals and dend.

[Floofatiel]

I haven't grown orchids for a bit but last year I got a mini phal from Kroger and a latouria dendrobium from Lowes, I want to say den. Green Flash. Neither was doing great but the dendrobium was in particularly bad shape so I potted them up loosely in sphagnum moss to keep them hydrated. If I recall the den. had okay roots somehow, but was just a bunch of shriveled yellow canes on top. It now has a bunch of short green growth that has come up. Around valentines I got a dyed blue phal from Walmart. Not normally my thing but it was on clearance so I was like, why not? It hasn't been repotted yet and is in bark. So far pretty healthy though the leaves are starting to yellow. Probably needs fertilizer. Then the other day I got another phal from Walmart. (I work there and sometimes plants go on clearance. Fortunately they take pretty good care of them where I work or I would be in trouble. Lol! I have a soft spot for dying plants.) It has one root left which is also starting to rot.
I grow them on the windowsill during winter and outside in the summer. What would be the best media for each different one? I thought about staying with the sphagnum, some sort of mix of ingredients, plain bark, maybe even semi-hydro. Just haven't done this in a while and am sort of lost. Oh, and does it matter the type of pot?

TLDR: I have a latouria dendrobium, a regular and mini phal and one normal phal with no roots. How and what should I pot each in?