Finished a game playing JG Nocturne went 14/2/14 with 170 cs and got an A+ while mid lane Fizz went 17/4/9 192 cs and gets an S so 3 more kills twice as many deaths way less assists and hardly more cs yet he gets an S seems pretty poor
The rating you get is based the how your score holds up against the top x% of scores for the champion you're playing. This means that what counts as an S in one situation isn't one in others. I, for one, got an S by going 8/7/21 with 102 CS as Fiddlesticks support. http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3188342100/224333215?tab=overview
