Potting advice needed for several species

[junebug's orchids]

Hello all. I have some new orchids coming in this week that I wanted to seek some potting/mounting advice on.

Angraecum didieri - I am planning to mount this on bark and place it in a partially enclosed orchid terrarium. Drainage layer will be approximately 2" of gravel. DIY soil mix including miracle-gro organic soil, lava rock, osmocote, and bark chips. In the potting soil mix I'll be planting jewel orchids and possibly, eventually, a peperomia plant as ground cover.

There is going to be a bark flat in the tank, and this is where the Angraecum will be. Tied on with black cotton thread, packed with sphagnum moss, and the rest of the flat will be decorated with live moss and tillandsias, and a philodendron I have on backorder.

Thoughts on this setup? I'm trying to keep humidity in while allowing proper drainage and circulation.

Pleurothalis allenii - This one will be interesting. It's the hardest orchid I've ordered (as far as growing in my zone and in my house). It seems to prefer a slightly different temp and humidity range than naturally occurs in this room. My plan is to place it in a bubble terrarium hanging on my wall, near the window where it will get indirect sunlight.

I don't know whether I want to mount it, or pot it though. I can provide acceptable drainage either way, but wanted to get thoughts on mounted vs potted for this species.