I go 21/2/3 and get a S-
im so confused how you can carry a team with 90% of the kills and still get a S- when you ahve over 300 Cs and 21 kills and only 2 deaths [slayer-jinx-unamused]
8 Comments
You only had 200 cs. It also depends on other things too. Good job though
Objective participation/warding are other factors, and theres other things too.
I also don't know the actual game length. Over 300 cs is probably fine if it's around 40 minutes or less, but if it was an hour long slugfest then that gets less impressive.
I went 1/2/2 on heimerdinger but got like 90% of the CS, got rift herald, and got like 7 turrets. This gave me a S-. I think you gotta do more stuff like that
How many wards did you place?
How many wards did you destroyed?
How many towers did you destroyed?
How many Dragons/Barons did you help to get?
Did you used any of these? 
It not just KDA and CS that makes the grade.
literally unless you are the support the only thing they care it's your cs (and for being a support if you take cs you are more likely to get s too)
i saw a 2/1/0 s- tryndamere screenshot today
so, i guess it might be easier to hunt for s taking your favorite champion as a support
I don't know what champ your playing, I think a lot of the champs have high standards.
Weird thing that happened to me, I got an S+ rank playing Udyr on the Howling Abyss. And my KDA was 13/10/34. Tied for Highest gold, though only second highest CS. My only guess is that with 50 kills in the game, gave me near perfect kill participation.