I have a general understanding of combat rating, but do you know how exactly it is computed? All I know is if you play within your 'expected' skill there's not much change, but if you perform outside expectations (either higher or lower) your rating reflects that. From what I understand it takes the average combat rating on the team, and if it's higher the system expects you to lose, lower and it expects you to win. Is there more to it than that? Someone else suggested that it also factors individual combat rating per kill