I haven’t really measured par in my tank. My acros are around 6-8” below the waterline.How hot are your center "hot spots" as far as par? Part of the reason I ended up flipping mine parallel, couldn't get edge par without super high PAR in the center. I think 80% intensity is a sweet spot, which gives headroom in a Pro to balance.
I remember that you have multiple units on your tank, where as my nano has only 1 light on it. I won’t be running the lights this high if I had multiple units on a 4ft tank or so.