Player rating for tournaments across all installments of Heroes.

How do you suggest we determine the winner? I understand that the system isn't perfect, but we need to find a way to identify the winner. Judging solely based on the number of days is clearly insufficient. A simple example: in football, two teams can finish in the same position with the same number of points. In that case, the goal difference, number of wins, and other factors are considered. And no one argues with that.