Legend:
GP = Games Played
KDA = Kill/Death Average
Ao9 = Alive on 9 -- a new stat I'm tinkering with since staying alive in javs is so crucial to success. If you didn't die out during a game you receive 1 point in this category.
Margin = Margin of Victory -- average margin of victory per game. I debated whether to punish or improve your rating if your team won by a lot. I decided on punish, so Zidane won by an average of 12 kills per game, so he was on a better team and I'm therefore punishing his score a bit. You make it back in A09, since it's weighed more heavily and only winning teams can get the points from it (except the 47-45 win by time game, Shadowmere earned an Ao9 since he was still alive.)
Rating = Overall rating combining all the statistics. The ratings formula in excel is:
=((((D2/C2)*30)+(F2*30)+((G2/C2)*30)-(H2))*I2)/1.61
=((((Kills/GP)*30)+(KDA*30)+((Ao9/GP)*30)-(Margin))*Confidence)/1.61
I divide the overall rating by 1.61 simply to make the overall league average 100 rating. Anything above 100 is above average.