The only individual statistic to look at in an 8-ball league is the MVP points.
MVP points are calculated based on balls scored - balls given up. That will show the true ability. Less there is some other factors, such as your oppenent might break and run and you have NO control over that.
But in the long run, the better players will have many more MVP points than the others.
Our leagues don't incorporate this so we created a website to joke around with and keep track of the imporant stats.
We divided it into breaking, racking and total. Kept track of W, L, Balls made, Balls given up, ERO's, MVP points and 10-0's.
Remember an ERO is an Eight ball run out and is considered breaking and running or your oppenent dry breaking and you running out from there.