The humidity is a bit low...but sounds like your phals and pyschopsis are dealing with it. The catt will probably deal OK with it.
They'd all prefer more humidity, but the encyclia in particular may need it. I grow on shelves in humidity trays also, and keep my humidity between 50-65% or so, with spraying them a few times a day (being careful not to get water in crowns). I cool mist humidifier is a step I have not taken, but I know some folks here use them to good effect.