riot is really stingy with their S ranks
I just played a game...
27 kills, 6 deaths, 8 assists on Ori I had an okay-ish CS but still (gets A+)
Riot what the heck I hard carried that game doesn't that deserve an S ;_;
9 Comments
I agree it can be pretty tough to get S on some champs. Took me a while on Thresh, even KDA's of 4/0/30 sometimes do not grant an S- or above.
Looking at your game, it's possible a few things restricted your rating. Your "okay-ish" CS likely played a big part. Pretty low vision score, unsure if that's included in mastery ratings or not. Also very few objectives by your team. While 27 kills is quite a lot, 6 deaths is also a lot in the eyes of the mastery rating. I don't think I've ever received an S rating with that many deaths.
Not meant to criticize, just thinks you may want to consider working on if you're hoping to get an S in the future!
Yeah, it's crazy how CS is worth so much towards the score.
Going to end up taking a few years for my final level 7 token on 
...
Your rank is based on Not only your KDA and CS, but also vision score and objective participation.
So if you just played defence of dragon but never smacked the dragon you dont get participation credit for the dragon. same with towers and baron.
These crazy kids and their kda's
It depends.
Did you do a lot of damage? Damage is worth more than kills. If you have a lot of kills, but not a lot of damage, your skill may still be low.
How long was the game? Time itself is a factor on grading.
In the case of CS, you have to go above and beyond. Most mid laners usually have around 220 CS by the 20 minute mark or so.
Did you contribute to objectives? Turrets, barons, dragons... these all have assist icons for a reason.
And one final thing and usually the biggest contributor: Wards.
Warding also contributes to your score. A lot. How many wards you placed and spotted an enemy champion with them, how many wards you spotted and destroyed, and how many control wards you placed. Control wards especially are helpful for grades, because it seems almost nobody places the damn things but supports. Make sure to spend the 75 gold now and then for a control ward. Not only will it severely help your grade, it will help your team as well.
They are especially handy when you put them in a spot early game that nobody checks but passes by. Sometimes I buy a control ward on the first back and place it into a bush and it spots an enemy jungler or enemy roamer every few minutes, yet sometimes the game can reach the 20 minute mark and it's still there. Lots of easy free vision score.
For context, here's the game, its the top one of this person's page.
http://na.op.gg/summoner/userName=doodlzzz
KDA, while impressive, I assume you died one too many times. Six deaths is a lot. Kill participation is also great.
193 CS in a 36 minute game is trash. That's 5.4 CS per minute.
11 wards without any control wards at all is also trash.
shrug
GL getting an S rank as nami sup