Player rating for tournaments across all installments of Heroes.

Regarding point 0. Have you seen Kyle's formula? The leader's result is derived from a formula where the first-place value is subtracted from itself in the denominator, resulting in 0.

Forgive me, but: You made me laugh...
And how is the second column of the oscillator calculated for the leader?
It's the same zero... :D

To make everything look good and avoid "division by zero," you simply need to assign 100 points to the leader by default... and use the formula for the second and subsequent players...

Sincerely.