DT's or that frozen bio-plankton stuff once per week on average, and about 1/3 the recommended dose.
Some of my softies definitely seem to benefit from target feedings of it... particularly my colt (Alcyonium) and leathers. And I notice that #@%#$ anthelia taking over everything loves it too LOL.
I also believe that dosing some phyto benefits corals that don't directly eat phytoplankton, because the phyto feeds certain sandbed infauna, adn this sets off a food-chain reaction (cool, new term!) that ends with more zooplankton and other goodies that corals like.
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