Well, have ended testing. Last test was to mix 10 plots between 32B, 64B, and 128B. I gave them all 14GB memory, all 4T so there was no QS for memory reasons. All running together in the mix, they ALL ran nearly consistent, similar times. So as far as I can tell, less buckets buys u nothing, and uses considerably more memory/plot. Fewer buckets may take less from ur ssd, but not enough to matter to plot times it seems. So 4GB, 3T, 128B is what I’m using now. Of course, YRMV.