Don't take this the wrong way, but no quench, 10.5 to 1, and a cast crank for over 500 hp?? Not what I thought someone would build with all the knowledge and experience available about running pump gas these days.
I don't want this to degenerate into a "How to build a stroker thread" It has quench, I have used SCAT cast cranks into the 649HP range @ 11.8 comp. No issue at the 500+HP level--besides what would you build a stroker for? 400 hp?
If you swap in step pistons to build in quench and drop the compression to 10 or 10.2 to 1, and had a forged crank for the power levels your heads are ported for; I'd say solid roller. I hope the Scat cast cranks are strong enough for 590 hp as I have one in my 510hp 408" Magnum, but have heard I am at the top end of the safe limit.
Since you have gone down this path, a custom hydraulic roller that will bleed off a lot of compression might make it run on pump swirl.