Hi Connie, bractescens should do very well mounted, I haven't grown it that way but I've seen nice ones grown by other people on mounts.
I have mine in a 4" wooden basket filled with sphagnum and coarse LECA. It's in a bright SW window and gets cool at night (low 50's) in the winter, when I also keep it fairly dry. This time of year I try to water and fertilize just after it dries out and so far it seems pretty happy. Good luck, these make lovely specimens when they get big!
--Nat