My Xenia loved being mid-tank dead center under T5HO's in my 29gallon. I had good flow from each side of the tank. Enough for flow, but not enough to fluster the Xenia. I waved around, but not like in a windstorm. It pulsed, was always extended, and LOVED it.
Then.. I got an RBTA. I had to move the Xenia as it was right near where I wanted the anemone to live. Now it is about mid-upper on the left side of the tank, and within long reach of a frogspawn. It doesn't pulse all that much anymore, though it is extended and seems to be content. I wouldn't say 'happy' anymore. Flow also changed. It is in a corner sort of edge on from the left powerhead. It gets light/medium, but less chaotic/opposing flow.
The right formula? I have no idea. Try moving yours to a different spot and see?