DLE - in the tropics here ------- I grow them in scoria - 10 to 15 mm average diameter pieces. Pretty sure they could be grown in other sizes too. The humidity here is alright ----- not too low most of the time, and they have no problem at all with their roots getting temporarily dry. I use all plastic pots for all my orchids here. All opaque ones, non-see-through.
Humidity is generally ok over here in my part of the world. So the method I use is sort of like described in this image attached. Even though the pic is shown with smaller diameter scoria pieces that I might use for some phals ------ I don't use smaller pieces for regular size catts.
And - depending on the conditions, there is also the option to spray a certain amount water (how much we apply is own choice) closer toward the plant (ie. closer toward the centre of the pot). Certainly - everyone has their own methods of watering. So this pic is only just to show what I do in my part of the world. The bulk of my orchids are grown under a balcony. So the orchids pretty much never get rained on, unless the wind (during rainy times) blows so hard, that the rain blows into the growing area.
There's also a choice for pot size (diameter and depth). I have some catts growing in really large pots --- relatively wide diameter, and relatively deep. So when I water in the way conveyed in the pic, under generally good humidity conditions, the catts are generally fine with it. Although - for some catts that generally have thinner bulbs (such as some mini-catts, including aclandiae) ------- I can certainly spray some water toward the centre of the pot ----- no problem at all. The idea is to allow roots to get adequate moisture - without drowning (under relatively wet conditions for 'too long' ----- particularly avoiding very 'relatively cold plus very wet' for relatively long periods of time).
Also - absolutely not necessary to need to spray water all-around the outskirts of the pot. The other pic just shows how we can choose where we dump most of the water (such as if we use a water sprayer nozzle). The water doesn't necessarily need to always to be added evenly to regions around the pot.
Fertilising (relatively weak) --- once a month. And mag-cal application --- once a month. I figure that some of that stuff stays in the media. So whenever I do water again, then the plants can somehow still get something from the media. And - having various roots a little moist in the media at various is good (as the fertiliser and/or mag-cal needs to get in at least of the time).