What works best will depend on the fish. Most small reef fish would do best with more, smaller feedings, since they graze on bugs all day. Frogfish and other sit-and-wait predators with large mouths should be fed a large meal less than once a day.
I don't actually feed my fish on purpose. I have a trimma goby who lives in a tank with a lot of amphipods. He gets small meals more than once a day, because he eats the amphipods. I've fed him maybe a dozen times since I got him in February, and he's fat and happy just from grazing.
I feed my inverts a couple times a week, coral about once a week. The inverts are a micro decorator crab, hermits (that I feed because they actually are omnivores, not herbivores, and I keep them as pets instead of cleanup crew), a porcelain crab, and some micro brittle stars I intentionally feed. They get mysis. Including the porcelain crab! You don't need to give them filter-feeder foods, they'll grab mysis.