One thing many of us do is to put all the orchids in a similar media. That way they dry at a similar pace and it de-complicates watering.
Dens and catts for the most part, do like to be fully dry before getting watered again. Both like very well draining media.
Few orchids die from under-watering.
Another general rule of thumb for orchids is:
If you are unsure if the orchid is ready for water, wait another day before watering.