I'm several generations behind such uber-tech but, IMHO, 'superfly, progressive' seems to thrive on pixel-sample count: The more, the faster.

Lots of light helps, too...

I do test-renders with 14 pixel-samples, WIPs with 32, 'nice' with 64, 'good' with 96 and 'over-kill' with eg 256, run overnight.

Until my ageing twin GPU cards max-out on scene complexity, they like 1024 vols+buckets. I can push them a lot further by reducing via 256, 128 to  64. My CAD-Tower's CPU cores and network-render 'Box' also take that 64...