Champion mastery
So how exactly does the rating for Champion Mastery work? Because I have never (not that I am aware of) recieved an S+, and I assume that is due to getting deaths (a friend told me that you need to have 0 deaths to get S+). So one game as Blitzcrank support I went 3/1/8 and got an S. However last game I went 0/0/13 and got an A. I'm guessing the rating depends more on your kills than deaths?