My Brassia doesn't need a cold snap to bloom, but I do have a colder winter than you do, and I know Brassias will set more spikes with a cold winter snap. I'm not sure what their minimal cold tolerance is, so proceed carefully.
If your Paphs and Phals aren't blooming, then consider light levels up them and trace elements/fert. If any plant has had a tough year, it might take another to recover before reblooming, so that might be an issue as well.
Your Phrags will definitely hold off blooming if they dry out between waterings. They want to be wet constantly. Unless they have much caudatum species in their background, Noirmont has none they're happiest sitting in water. They're one of the few orchids that prefers to have 'feet wet.' I've had my best luck with sphagnum moss in clay pots, sitting in water. The pots need to get wiped down to prevent mildew, but the plants go bonkers!
Hope this helps!