Score: 404477
Wins: 5841
Losses: 5720
Winrate: 50.5%
You're going to see an awful lot of variation on this. I've played against people in pvp who had win/loss ratios of 10:1 and more games played than I did, but had much less score. I play mostly FGs and gold/plat arena, so my win rate isn't nearly as good as someone who farmed thousands of ai3 games. I have no idea why someone would farm thousands of ai3 games, but many people have done it, even though it's less efficient than other means of getting score/electrum, and this was true even before the arena came in.