Riot, the Grading System for Supports is Flawed ...
http://i.imgur.com/XybcI54.png
Despite I got Mastery 6 with one of my Supports ... I was baffled by which games granted me an S+ and the other an S-. Let's take a look shall we? I'll even link the sources so you can see they're legit. (too bad it doesn't show what grades I earned, that would be nice Riot).
http://i.imgur.com/swQruI5.jpg S+ with Nami Support.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2203182243/219480029?tab=overview
http://i.imgur.com/53rtY9U.jpg S- with Nami Support.
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2207349243/219480029?tab=overview
How is it that a game I go 1 / 1 / 30 grants me a S- but the game I go 6 / 4 / 28 grants me the S+?? Isn't that basically telling me in order to get a higher grade, I must purposely steal kills from my ADC or allies? Let alone, I warded more and bought more pinks in my S- game, PLUS look: I participated in 7 out of 8 of those tower takings, and I assisted in all three dragon kills. The other game I only helped take down 3 of those 6 towers and did only 2 dragon assists. Still, the game only graded me higher on my S+ because I got more kills than the average support would. That's basically awarding Supports for being selfish, and it makes me feel dirty for having my Mastery 6 token on Nami. That and because I had to craft it through the hextech system.
[slayer-jinx-unamused]