I have never raised any Paphs of any kind in straight charcol. I guess it is okay if you don't mind watering every day, but once your collection grows that will be a problem. I have mine in a couple of different medias - small bark and perlite, small and medium bark with small charcol, and medium bark with about 15% cut sphaghum mixed in. (Phrags seem to like the sphaghum). I have one where I am experimenting with bark, CHC and leica mix.
So- Paph gurus out there - - what do you say?
PS - I really like that ciliolare. Where did you find it?