It is my understanding that Dosage Index (the ratio of speed to stamina) is really what dosage people use as a yardstick to determine a horses ability to go a certain distance (>4.0 being the number they throw around for the classic distance). I am not a dosage expert or believer though so perhaps you are talking about something else. The points are just an accumulation of that spectrum from brilliant to professional. Also, not sure who dosage works because it completely ignores young sires.

Talk is Money's (HF's Sire) Blazing Sunset just won at 9F in the Alydar so I don't think distance is a problem on top and Margay is out of CC so I don't see how anyone can question his ability to go 12F, especially based on his last two races where he won for fun. He was confirmed for the Belmont too, now I just hope nobody likes him.