I agree that ranking is difficult. Fx, I got accepted into Columbias MFE, Princetons MFin, NYUs finmath, Oxfords MathCompFin, Cambridges MFin, and LSEs Econometrics programs. I was in doubt (wanted to go to us, and to a "famous" uni which is why I didn't apply to fx Baruch - know it's silly, but...