Just from my own experience with a rainbow bubble tip that has since split into two and grown. I have always had just one AI Hydra 52HD, about 10 inches above the water.
My choice of lighting was based on the desire to have a mixed reef and I liked the functionality and aesthetic of the AI Hydras over other LEDs liked the Radions. I've always wanted to keep clowns and an Anemone so after listening to a video post from Melevsreef I decided to try an anemone once the tank was around 6 months old. I'm going on 1.5 years and I still have that same anemone, two of them now, without any hosted clowns, since my clowns seem to prefer the top front corner of the tank.
I do feed the anemones a scallop chunk once a week. So far they're growing and have colored up nicely. I've had a porcelain crab living in one or the other for a few months now.
Not sure if this helps.