Fargo Rate
I play the 10 ball ghost on a 9' diamond with pro cut pockets and worn cloth multiple times a week. I would probably put it at about 675.
I have played many 650s and in a race to 7, 9, or 11 it is very difficult for them to win a set off of me (On a 9' table. On a bar box every match is a sweat!). I would much rather play a 650 than the ghost. My FR is 737 today so FR says in a race to 7 they would be 13.6% and less than 9% in a race to 11. I know my win rate against the ghost isn't over 90%.
It is just so easy to go down in flames against the ghost! You can fall into a little slump and dog off a few games so quickly it's astonishing, and quickly find yourself in a do or die situation down 7-3 in a race to 9. At that point you have to play perfectly and with a bad roll or a tough cluster off the break it might be too late.
In contrast, when you play a human it just seems like there is more time to recover. You have some time to regroup in the chair. Sometimes they make a mistake back and you get pumped up because you got away with one. Etc.
Bottom line, the consistency of the ghost is what makes it such a tough opponent. That all said, I would much rather play the ghost than a 700 FR player that is going to fight me hard for every opportunity, run racks off the break, and so on. So I figure 675 has to be pretty close to the number, that's when I'm not sure who I'd rather gamble against.
As for straight pool, it's hard to match it up as it is such a specialized skill set. In straight pool John Schmidt would be an 810 FR, and some 800s might be much lower.
I know 650s that have 100 ball runs, and I know 700s that don't. I love straight pool but it's not my best game. Maybe there are a couple of weak links that have prevented me from attaining super high runs. I've run over 100 a handful of times but it's tough for me. Meanwhile many of the short stops in my area in the 80s and 90s ran hundreds much more than me, maybe because the game was played more frequently. I'm sure there's a correlation between FR and 14.1 high runs, but I think there will be shocking variance. Possibly just as much as the variance between rotation and one pocket where Tony Chohan can be considered Elite and some international 800 FRs are merely shortstops.