Yep, this is one of the best clear videos ever captured. Not just for this build, but for ANY build.
So, it turns out this build can 100% for sure do 147 at 10k paragon. This clear was accomplished in 12 minutes. Even if your clear speed scaled downward directly with the increase in monster HP as you go up in GR levels, that would only be a 17% increase in clear time, to about 14 minutes.
And, that isn’t the way the scaling works. Stuff like AD and Stricken works against that increase in time. So I’d say 148 is basically a sure thing as well, let’s call it 99% probability. Even 149, I think, is more likely to be possible than to be impossible (>50% odds).