I have evolved over these many years to Raybark's #2: "adjust the medium, customizing it as needed so you can water everything at once." My evolution comes from getting different orchids, after I got over buying and rescuing big box store cast offs like Phalaenopsis. Different orchids seemed to require different potting style.

For Phalenopsis, I have half of my plants in New Zealand Sphagnum Moss and the other half are in bark mix. In either case I pot them in clear plastic pots with slits allowing for air exchange and moisture evaporation. The plants in moss are not watered as often as those plants in bark. I live in Fort Wayne, Indiana so in the winter time it is critical that my plants have good air circulation, good relative humidity, and warm fresh air. In the Summer, when these plants go outside I have to pay close attention to moss potted plants as if it rains too often, these plants can suffocate with too wet moss and not enough air/dry time. The bark mixed plants--no worries.

My bark mix: Orchiata medium size, equal sized sponge rock or grow stones, charcoal, and LECA.