Did S2 change the M+ Rating formula?

Community General Discussion
1

I would love a Blue post reply for this one –

Did S2 change the M+ rating formula? The original formula has been documented fairly extensively in a few places, as an example:

… and as of DF S1, they tweaked the formula a bit to add 2 points for each level over +10, as shown here:

I have a WeakAura that does these rough calculations and helps me figure out which dungeon I should run and a rough guess of how many points I’d gain for running a specific dungeon at a specific level. The values in it seemed to track closely to actual achieved scores, but now they seem off.

A simple example is Neltharus+11. I ran it today, and I timed it with 3 minutes to spare, roughly:

As shown here, Neltharus+11 earned me a total of 147 points, as I have not run it on Fortified week yet. In DF S1, the math to calculate how much rating I’d get if I (just barely) timed a +11 on only one weekly affix would look like (level here is 11):

1.5 * (50 + (level * 5) + ((level - 10) * 2))

The 1.5 here is because they weight the higher of the two weeks (Tyrannical/Fortified) by 1.5, and the lower by 0.5. Since I have never run Fortified yet, we can skip that. This shows that using DF S1 rules, I would have earned (1.5 * (50 + 55 + 2)), or 1.5 * 107, or 160.5 overall rating for Neltharus. There is a bit of wiggle room points-wise for being a bit over or a bit under the timer, but if I timed the dungeon, this value represents the lower bound I could possibly have.

And yet, I have an overall score of 147 for Neltharus, despite running a +11 and timing it with 3 minutes to spare. if I divide 147 / 1.5, I get 98. This tracks with what the Lua API offers for Neltharus (mapID 404):

/script print(C_MythicPlus.GetSeasonBestAffixScoreInfoForMap(404)[1].score)

This prints 98 for me, which is too low even by SL S4 standards (without the extra 2 points it’d still be at least 105).

So… did Blizzard change the formula? Something doesn’t add up anymore, and I could really use an official answer. If anyone else saw an official post (like the wowhead link above) and I just missed it, I’d love to see it.

Thanks in advance.

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2

It seems like M+20 is 170, and M+21 is 177, and M+18 is 156. This is the base score (before the 1.5x best week multiplier). Your base score for that 11, as you stated, is 98. Since you timed it with three minutes to spare, I think the base score for 11s will be 97 or maybe 96.

All 20s is still 2720, it may have changed at the intermediate levels with the change in affix distribution. Now, there are two affixes at 7-13 and three affixes at 14+, there is a little score jump to reward people for adding another affix and the score jumps seem to have moved.

I think it has changed earlier. A +++6 from season 1 has a base score of 70, but a +++6 from this season has a base score of 65.

3

Oh, you’re right, it is going to be the offset affix bonuses (7/14 vs 4/7/10)! I’ll see if I can make sense of it with that in mind…

1 Like
4

Rita – Thanks for the inspiration by calling out the observed bases. I ended up digging through this page:

(I chose a single role/dungeon/faction to cut down on pages.)

I then simply wrote down every just-barely-timed score for each new key level threshold, and the picture started to become clear! It looks like the formula is now:

baseScore = 25
tyranOrFortBonus = 5 (you could word this as base=30)
weeklyScore = baseScore
            + tyranOrFortBonus
            + (keyLevel * 5)
            + (affixCount * 10)
            + (max(keyLevel - 10, 0) * 2)

Running the numbers for M+2 through M+30, this yields these unweighted weekly scores:

+ 2  :  40
+ 3  :  45
+ 4  :  50
+ 5  :  55
+ 6  :  60
+ 7  :  75
+ 8  :  80
+ 9  :  85
+10  :  90
+11  :  97
+12  : 104
+13  : 111
+14  : 128
+15  : 135
+16  : 142
+17  : 149
+18  : 156
+19  : 163
+20  : 170
+21  : 177
+22  : 184
+23  : 191
+24  : 198
+25  : 205
+26  : 212
+27  : 219
+28  : 226
+29  : 233
+30  : 240

This is the information I needed. Thanks for the push in the right direction.

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5

Hate to slightly Necro the thread here but I am trying to understand the math.

For this formula what is “max” and then this does not include the 1.5 best week multiplier correct?

baseScore = 25
tyranOrFortBonus = 5 (you could word this as base=30)
weeklyScore = baseScore
+ tyranOrFortBonus
+ (keyLevel * 5)
+ (affixCount * 10)
+ (max(keyLevel - 10, 0) * 2)

6

Yes, when I used “unweighted” I meant “before multiplying each appropriate week by either 1.5 or 0.5.”

I ended up implementing this for my guild in a WeakAura if you wanna skim the Lua code (or just try the WA) here:

https://wago.io/HuXrx2XHJ

Fire it up and dig around in the Custom Options tab to play with how it looks!

The relevant nugget you might be asking about is probably this snippet:

        -- Calculate how much one week's worth of score at the requested level would be worth
        local extraAffixes = 0
        if level >= 14 then
            extraAffixes = 2
        elseif level >= 7 then
            extraAffixes = 1
        end
        local timedScore = 25 + 5 + (level * 5) + (extraAffixes * 10) + (math.max(0, level - 10) * 2)

… then later, I calculate the final weighted score from the two weeks’ worth of scores for a given dungeon like this:

local currentTotal = (math.max(weeklyScore, otherScore) * 1.5) + (math.min(weeklyScore, otherScore) * 0.5)

None of this accounts for the 5 or so points of wiggle room you can get by being a few minutes faster than the timer (say), but since it leans conservatively, it accomplishes its goal of helping you figure out what key level you need to run for a given dungeon, or which dungeons aren’t “worth it” anymore, which is good enough for me.

Hope that helps!

Edit: If you do end up playing with the WA, one fun thing to do is fire it up on a character that has never run a key this entire season yet. If you set it to 10 columns and set the key level to 5 or so, you should be able to see the pattern, such as:

Note how a single week’s projections go up linearly except at the new affix boundaries (7 and 14), where they spike a bit, and how if you “just barely timed” +14 for all 8 dungeons on both weeks, you’re projected to have a rating of 2048, which tracks. I’m sure this WA could be improved, but our guild relies on it to pick keys and trust the numbers it spits out.

7

I use addon mythic plus calculator.

8

My Evoker is at 2768 rating with all timed twenties for both Fortified and Tyrannical, and not a key level lower or higher on anything.

9

There are up to 5 points of additional rating for the equivalent of “3 chesting” (Legion term) a dungeon. Those additional 48 points are simply you gaining some extra points here and there across those 16 runs.