Champion masteries seem to be an awesome idea, and you have my total support on this idea :D A few questions concerning the grade that you get based on performance on the end of a match.. how do they decide the rank? Does it rank on k/d/a regardless of champ? If I did play support as janna or something and went 0/0/10 would I be given a good grade? even 0/2/10? Or is it something deeper than k/d/a?
Deep Terror Nami3 votesStats have different weights depending on your role, so Supports aren't penalized for only having lots of assists and no kills or CS.
Actually no that's wrong. Your score is based on how you did compared to the average for that champion.
It’s based on the champion and role that you just played in a game. So, for example, we look at Annie mid differently to Annie support. We take a series of performance metrics and compare how you do to all other players in your region in your champion / position combination. It is percentile driven - so earning a high score means you performed in the top x% of players on that champ in that position. The grade itself governs the point gains.
ThiccAssNoodle1 votes[{quoted}](name=Deep Terror Nami,realm=NA,application-id=3ErqAdtq,discussion-id=gLZ8wJVo,comment-id=0000,timestamp=2015-05-08T17:25:00.431+0000)
Stats have different weights depending on your role, so Supports aren't penalized for only having lots of assists and no kills or CS.Actually no that's wrong. Your score is based on how you did compared to the average for that champion.
Yup, I just got an S- as Nidalee support with 11/8/8, 47 cs, and 13.1k gold (the SECOND LEAST amt. of gold on my team...). I suppose not many players play Nidalee support, so I got a super good grade though I didn't even play THAT good. Break the meta for dat grade doe?
DeathBurst1 votesTo elaborate a bit on that part: "We take a series of performance metrics" ==> Riot always refused to say what metrics exactly, but people have tried to guess. It's pretty sure that it contains at least CS, number of deaths, number of kills; and Riot also confirmed that for Supports specifically kills+assists counts as a single score (which implies that for non-Supports, assists either count less than kills or even not at all).
Beyond that, no one really knows for sure, but common hypothesis include: kill participation, wards placed and destroyed, damage dealt and taken (either in absolute or in percentage of the team), number of towers takedowns, number of Dragons/Barons your team got (for the Jungler position), and all metrics may or may not be normalized by game length. There is also the fact that all factors don't count as much as each other, and the exact weight of each factor can vary position by position.
I understand that Riot wants to minimize players gaming the system, so they don't want to say exactly how it functions, but I always argued they should at least reveal the list of metrics used, if not the exact weights.
jackie06053 votesI went 16/1 and like 240 cs as yasuo and that was an S+. I got a similar score with him, 15/2, but got 197 cs, and that was an A. I wanna say cs is probs the most important part.
HaIlMonitor1 votesI think farm is the most important. I was "cheating" Kha mastery by honestly just rushing Taimat so I could farm faster lol.
T0M Chiconi3 votesGrading definitively does not work correctly in ARAM, that I know for sure :). 13/2/21 while I seriously focused on shielding/healing ;)
http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3156601425/25285847?tab=stats
xxsupawarriorxx2 votesthis grade stuff id BS i went 6/1/16 with Janna and got an A-
http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2480067511/201479699?tab=overview
goyangee1 votesit might be that higher percentage of people get more than 6 kills in ARAM- I've seen nami go 8/2 and Sona at 11/3 Janna 7/3/59- probably a longer game tho who knows
Yasuo Master2 votesFewer deaths are the most important part. Then is your kill and farm.
Xareav2 votesI have done ARAMs without dying 3-4 times, very high kill participation every time, A of some sort every time. This last time I was 0/0/28 w/ 27 cs today with Janna, A-. They were never able to push tower b/c I never died and kept wave clearing with Q. I can't even count how many times I saved allies, but my crowd control score was 96 in a 20:06 game. I didn't do much damage (maybe 50-60% the average carry), I didn't do much healing (I never died so I had starting items) - 60% of my damage - and of course my cs was low.
Not dying at all while meaningfully contributing (90%+ kill participation) gave an A-, so I have no earthly idea how they're grading.
AMYS GRAVE1 votesIt counts more than kda, i played janna went 1/4/22 and placed 32 wards and got an S+ grade in a 40 min game. Four deaths probably doesn't deserve an S+. I think it takes cs, wards, turrets destroyed, etc... as well as kda.
Kazaashi1 votesIt counts more than kda, i played janna went 1/4/22 and placed 32 wards and got an S+ grade in a 40 min game. Four deaths probably doesn't deserve an S+. I think it takes cs, wards, turrets destroyed, etc... as well as kda.
KDA is kill+assists/deaths. so 1/4/22 is a 5.75 KDA. Pretty beast in my opinon.
insaiyanbacca1 votesas far as i can tell its a combination of kda wards placed objectives you helped take and i think cs compared to the average
Critmaster Garen1 votesi played sivir one game, went basically 1/4 but still got s+ and 2/3 of the xp for the first mastery level. i guess it took into account how many turrets i destroyed just by splitpushing.
i didnt even have to care how much i died, i just took 2 turrets by midgame, when the enemy team was trying to get 1 somewhere else. so not a good k/d/a but ridiculous amounts of cs and a lot of objectives taken.
cvxhi1 votes"It’s based on the champion and role that you just played in a game. So, for example, we look at Annie mid differently to Annie support. We take a series of performance metrics and compare how you do to all other players in your region in your champion / position combination. It is percentile driven - so earning a high score means you performed in the top x% of players on that champ in that position. The grade itself governs the point gains. "
-League of Legends Champion Mastery page http://na.leagueoflegends.com/en/page/features/champion-mastery
felix1bloody1 voteswhen i get really good stats with a champion, like 17/4/11 i always get an A, never an S. The avarge stats of jarvan 4 cant possible be 17/4 uh? So why do i get an A...
Lux Crownguard1 votesi just went for kills when i went vayne. i got a KDA of 21/0/4 in 21 minutes which led to a surrender but i only got an A grade cos of my CS which was 97. lets say for an adc you are looking at kills and alot of cs too. i had alot of kills but i lacked my CS which resulted in that A grade.
DeathBurst1 votesSo to complete a bit some other answers like Deep Terror Nami.
There is two key parts in the grading system:
To elaborate a bit on the first point: Riot always refused to say what metrics exactly, but people have tried to guess. It's pretty sure that it contains at least CS, number of deaths, number of kills; and Riot also confirmed that for Supports specifically kills+assists counts as a single score (which implies that for non-Supports, assists either count less than kills or even not at all).
Beyond that, no one really knows for sure, but common hypothesis include: kill participation, wards placed and destroyed, damage dealt and taken (either in absolute or in percentage of the team), number of towers takedowns, number of Dragons/Barons your team got (for the Jungler position), and all metrics may or may not be normalized by game length. There is also the fact that all factors don't count as much as each other, and the exact weight of each factor can vary position by position.
I understand that Riot wants to minimize players gaming the system, so they don't want to say exactly how it functions, but I always argued they should at least reveal the list of metrics used, if not the exact weights.
Crackerkid911 votesSeriously need to fix this grading system. Played Lux recently and when 18/3/29 and got an A. Along with that I main support and one blitz game I had I went 3/1/9 and got a C! Riot said they were going to have a tailored grading systems for support players but obviously something is wrong. I keep getting so many keys and no chests. Unless something changed I'm not aware of this grading system is TERRIBLE! Please fix or remove.
AR URF1 votesI remember when I got s on bard mid, when I felt that I didn't deserve it. I picked bardmid, because hurr durr our team decided to ban yasuo even when I had him hovered. So I'm just like "fuck this, two can play the game of troll" So I picked bard mid. I won lane and we won the game too. I'd do the same for other champs to. I'd troll or dodge if janna was banned because I already know that the person probably on youtube not paying attention to the screen and not communicated pre game with the players.
danrc1 votesyeah it would appear as adc at least your cs is really important (vision score probably also contributed) http://matchhistory.oce.leagueoflegends.com/en/#match-details/OC1/179580206/201827370?tab=overview
Pyx Peddo bear1 votesi got 9/0/12 and did just get an A in grade? WTF
anarde1 votesI just went 8/0/25 as 
in a 19 minute long ARAM with 35 total team kills (I missed having a hand in only 2/35 kills). I had the 3rd most kills on my team (only 2 less than the highest in the match), and the most assists in the match.
Even with just 
and 
for items I had the 3rd most gold earned in the match (highest was 12,825 mine was 12,017), 4th highest damage dealt in the match (slightly larger gap, highest was 27,787 and that's 7k above the next highest. Mine was 16,712), and I had the highest CC score in the match.
I felt I was helpful when pushing even later in the match and I saved my teammates countless times when retreating but I was always alive to clear creeps at tower to stop counter pushes.
We had two people with 
(I was one of them) so mana was mostly a non-issue. What I feel like was a very well played match earned me a B+. The 10/6/17 Ori got an A-. I'm a little salty right now.
everafter1 votesI had a 15/1/17 on Lux with 82 cs and got a_ B+_ and that was literally the biggest disappointment ever wHAT DID I DO WRONG
PimpStickNasus1 votesI had a 15/1/17 on Lux
How long was the game? 82 cs seems pretty bad. Also if it was an Aram Lux generally does well there so there's that. If it wasn't then warding and objectives matter a lot too
BubblyRainbows1 votesCS is definitely important, but it's really irritating when you have an AMAZING KDA and get a low grade. I went 11/0/8 in a 28 minute game with like... 120 CS. And I got an A- for it. Zero deaths. ZERO. And the next-highest score on my team was 7/6. I'd really love to know exactly how everything factors in.
On ARAM it's even worse. You go 13/4/20 on Taliyah (84 cs) in a game mode where you can't CS effectively and can't recall to heal, and it doesn't even rank an S-. I believe I got an A+ that game.
apbuggy1 votesSpeaking of which, I've had multiple games with Janna (And a couple other healing supports had the same effect, but mainly her) where I would go 0/0/8 or 0/0/9 and the game would end in 20 minutes, but I would get a B. I was quite confused, as I've gone like 4/10/16 and gotten a B+. I'm assuming K% has something to do with it, but it still seems weird.
GINAlover1 votesI just played a 3's game where our team has 13 kills total. I had 12 kills and 1 assist so was apart of every kill. I had the most cs in the game and had the most damage in every category. I dont understand this grading system. I was using Diana who I main and got a S-. I am thinking riot has some sort of algorithm to not give out higher grades. If I get a S I get my last mastery token to get to lvl 7. Really starting to think I am being rigged out of my grades.......
MystixSpirit1 votesJust gonna say went 30/1/5 as Fizz with 109 cs, 5 tower/inhib take downs, and got an A. Pretty sure cs is a big factor as well as champ and position. you Guessing depending on the positions kills are worse less ( ex. mid and adc champs killing 30 enemies are worth less than a support killing 30 or less).
IrishPotato1011 votes[{quoted}](name=Yosuke Apperu,realm=NA,application-id=3ErqAdtq,discussion-id=gLZ8wJVo,comment-id=,timestamp=2015-05-08T17:21:54.153+0000)
Champion masteries seem to be an awesome idea, and you have my total support on this idea :D A few questions concerning the grade that you get based on performance on the end of a match.. how do they decide the rank? Does it rank on k/d/a regardless of champ? If I did play support as janna or something and went 0/0/10 would I be given a good grade? even 0/2/10? Or is it something deeper than k/d/a?
i went 14/0/10 with zed 147 CS and got an A so... CS must be really important.
Malekai221 votesLeagues grading system is garbage. My friend and i both used karthus at different times. I got 25/10/15, she got 21/12/15. She got an s-, i got an A. Its absolutely trash
