I have zoanthids in strong light and low light, high flow and low flow and they are all doing great. I feed all my corals either Reef Chili or Bene-Reef. I think zoas are pretty easy to keep and rather undemanding.
The ones under strong light and high flow (though they also did well under less light and flow before I moved them)...
And these are under lower light and flow and have been doing very well too...