I am not an expert, but from what I have read your corals see more of the blue and Royal Blue light than to the white light. The whites are more for your taste not your corals. You have your RB light set lower than white. Why did you do that? I would bump that RB up and see how your corals respond.
I have had my fixture running for 4 or 5 weeks now. I have seen a significant change in the coloration of my corals for the better. The brown is leaving and the pigments are getting brighter. My blue and RB are bright and I have toned down my white to about 55%. I am planning to lower that even further. It is not needed. I am also planning to add three UV modules to my 6 ft fixture.
I agree - I would shoot for 75% on Blue and RB (tweek as you like) and keep whites in 25-50 (min max). I would not go over 60% on UVs (just my opinion). I have one pad for each of my SR260s. Hope this helps.
Dave