It's hard to say. Ryan's patterns are for 1000-nit masters, and will not resolve patch 723 (75.2%) and above. Looking at zoyd's tone mapping curves, 4000-nit masters can go all the way up to about 83%.Do you think Ryan's white clipping pattern would help you?
Yes, the question being whether we can achieve the higher clipping with the limited adjustability of the 5040UB.I guess the ideal would be to have 2 calibrations - one for each mastering display
I've added an HCFR feature request to have the current Near White scale made adaptive, to measure HDR clipping. For SDR, I find the Near White pattern easier to use than flashing clipping patterns.