How are mastery grades at the end of game determined?
I just finished a game, we were losing by a fair bit, our
and
were 2/10 and 2/8 respectively, and I was supporting as
. Between myself and our
mid, we turned it right around and ended up winning, and I finished with a score of 2/0/27, having laid down countless wards, saving, healing, shielding, etc. allies. I ended up getting an S-, which I'm not really complaining about because I know it makes no difference, I'm just curious what I could have done to get an S+. Is it because I only had 2 kills? It'd be cool if it took into account whether or not you're playing a support champ.
Thanks! :)