An update:
I bought Capanemia uliginosa and Pleurothallis leptotifolia from Andy's, bringing the total in the fridgarium to fourteen! I've put almost everyone on cork or in a net pot with sphagnum. In alphabetical order:
Capanemia uliginosa is working on a new growth
Dendrobium cuthbertsonii is recovering from its former decomposing home
Dendrobium lichenastrum is pushing four new growths
Dendrobium lichenastrum var prenticei is fairly status quo
Dendrochilum gracile has multiple new growths with spikes!
Dracula saulii suffered some spike losses when I repotted, but has new leaves
Epidendrum neoporpax seems like it's doing alright
Haraella odorata has four (!!!!) flower spikes and is growing roots like crazy
Masdevallia veitchiana has two spikes and two new growths
Pleurothallis leptotifolia arrived in bud, bloomed (so cute!), and is working on some new growth
Pteroceras semiteritifolium continues to not do much for me
Restrepia brachypus has a new leaf that should open soon
Sophronitis coccinea has a cute new growth
Trias oblonga hasn't done anything different since putting it in here
As mentioned before, daytime temperatures at 67°–70° and a 6 hour night at 57°–60° with 10 hours of daylight.