Published On: January 9, 2021

How your Damage is actually calculated in Raid: Shadow Legends


In this article, we are going to break down the maths that goes into your damage output in Raid Shadow Legends so that you can have an understanding of how to output the most amount of damage from your champions.


This excludes certain champions who’s multipliers are based on multiple base stats, and also excludes Enemy Max HP damage.

This is the formula for how damage is really calculated.

Total ATK (or HP or DEF for HP or DEF champions) x Skill Multiplier x Increase Damage from Books x Crit Multiplier x Mastery Bonuses x Chance of Affinity Bonus x Buffs x Passives x Defense Mitigation

  • Total Attack = The total attack stat shown on your Champion page, any attack gained from an aura is also accounted for here, so x% of base Attack + shown total attack.
  • Crit Multiplier is 100% + Crit Damage % assuming you always crit.
  • Skill Multiplier is looked up from a Data Mined Source
  • Increase damage provided by books is found on the ability description
  • Buffs (example 50% Increased attack – 60% Increased Defense)
  • Passives such as Bad-El’s 20% increased damage to enemies under poisons

Above is the total formula, the Defense Mitigation is a little harder to explain, so let’s focus on the pre-mitigated damage breakdown.

Total Attack x (1 + Crit Damage%) x Skill Multiplier With Books x Mastery Effects x Buffs, Passives, Affinity Multipliers


From this formula, it is clear that books and masteries are of significantly more value than previously anticipated.

For example, for a champion with 250% damage, a 10% Damage increase from a skill book is 1.1 x the above formula.

Whereas +10% Crit Damage is only turning your crit multiplier from 3.5 = (1 + 250%) to 3.6 = (1 + 260%) which is only a 3.6/3.5 = 2.8% increase in damage.

For example, with numerical values:

Let’s take Kael and his A2 – Acid Rain – 100% Crit rate vs Void Affinity.

Kael has 1,200 base attack and his A2 has a multiplier of 4.65 x ATK and can be booked for 20% more damage.

If you build your Kael with 3,000 attack and 180% Crit Damage – No masteries, his damage would be:

3,000 [Total Attack] x 2.8 [Crit Multiplier = 1 + Crit Damage % / 100%] x 4.65 [Skill Multiplier] x 1.2 [Additional Damage from Books]

3,000 x 2.8 x 4.65 x 1.2 = 46,872 (Damage before Mitigation)

Now lets say, you roll an item and it gains +5% attack
5% of his base attack is +60 attack so his new damage breakdown is:

3,060 x 2.8 x 4.65 x 1.2 = 47,810

Instead of that +5% attack, let’s compare +5% Critical Damage, which changes the Critical Multiplier to 2.85 instead of 2.8, his new damage would then be

3,000 x 2.85 x 4.65 x 1.2 = 47,709


5% C.Dmg gained us 837 damage
5% Attack gained us 938 damage

Now as a comparison – instead of adding stats, we will add the 5% damage gain from Heart of Glory mastery (when attacking with full hp)

3,000 x 2.8 x 4.65 x 1.2 x 1.05 = 49215.6
So a 5% Damage mastery caused a 2,343 gain in overall damage.


How do buffs/debuffs affect this?

Just as examples:

A 50% Increase attack buff, would further increase the total attack value by 50%
Bad-El’s passive is a straight 20% increase on this damage
25% Weaken debuff on the enemy, is a straight 25% increase on this damage.

In this case with Kael, it’s clear +5% Attack is better than +5% Crit Damage. With 180% Crit Damage, the point at which Crit Damage and Attack are equally valuable is when Kael has 2.8 x 1,200 Attack or 3,360 Attack.



The perfect build is to aim for the ratio between Total Attack to Base Attack to be 1+ Crit Damage % / 100%

The damage from booking a champion likely will increase damage more than adding more base stat to your champion.



  1. Dark_saber January 20, 2021 at 1:03 am

    HH, I love your content. Thanks for doing all this hard work. I am confused about damage multipliers though. If you look at Acolyte, he has a 6.3 bonus for his A2, but it is listed as “average” or something like that, while Ogryn Jailer has a 6*ATK, and he is listed as godlike. And Acolytes damage books higher. I read your explanation of damage, but am I missing something?

    • jekoh January 23, 2021 at 12:59 pm

      All multipliers and all addition of extra % are calculated from base stat of the champion.
      Ogryn jailer has a base ATK of 1299, so nake he will hit for 6 * 1299 = 7794
      Acolyte has a base ATK of 749, so nake he will hit for 6.3 * 749 = 4719
      you see the big difference
      you cannot base your choice only by having a look at multipliers alone. you have to look at the base stat, to look if the champ is not also ignoring part of ennemy defense when he hit as a specificity of his ability, and if he is hitting several time with the same ability

  2. Legion_X February 6, 2021 at 3:50 pm

    Thanks so much! This tool really has helped me tremendously.

    • Phixion February 6, 2021 at 3:53 pm

      You are welcome mate :) glad you liked it

  3. HisChild February 7, 2021 at 9:58 pm

    I understand what the base is for HP, ATK, and DEF, but I have no idea what to use for base for support Champions.

    • Phixion February 8, 2021 at 1:19 pm

      Have a look at what their attacks scale off but building high speed and tanky (High Def and HP) is a solid start for your support champions.

  4. Turbozzz March 18, 2021 at 8:42 pm

    HH, I wish you’d add another thing to your champs and that being whether the champ needs crit rate or not or maybe do a video to show us that don’t know how to determine if a champ needs crit rate or not. thanks and I love all the content.

    • SS2020user April 4, 2022 at 12:22 pm

      Damage dealers should have crit rate, and a few supporters, t.ex. Armiger needs it to make his skillset work. Otherwise focus on survivability.

  5. Nny April 7, 2021 at 3:16 pm

    where is the Damage Efficiency Tool now?
    not under the membership sectionanymore and under the tools section i don’t find it either :s

  6. Asterisk April 15, 2021 at 5:06 pm

    Great guy HH. It took me past the 270 days ( more like year) to start to begin to understand the game mechanics and its all down to your way of explaining things. Watched loads of guides but truly hars off to you and others like DJ , Scratch, Ash etc. You all r dope.

  7. BiggTiggs April 19, 2021 at 12:27 am

    I think it’d be cool & relevant to see a video like “who is worth building over Kael?” using the spreadsheet of pure damage numbers and utility in different areas of the game! It’s something I find myself stuck on currently with a wealth of decent epics.

  8. sunset1 April 19, 2021 at 2:01 pm

    cant find the Damage Efficiency Tool

  9. amenaxa April 25, 2021 at 2:50 pm

    same problem. I miss it

  10. WITNES5 April 29, 2021 at 8:38 pm

    anyone ever find the damage efficiency tool?

  11. Evilish May 9, 2021 at 7:56 pm

    where is the damage efficiency tool???? :P

  12. Yellowrock May 11, 2021 at 2:49 pm

    Guys, try decreasing the Zoom (ctrl+-) and then open the RSL menu, it should be in tools, the last one.

    I’m serious.

    • Matt91 December 29, 2021 at 10:06 am

      Can confirm, as weird as that sounds, ty for pointing that out.

  13. Agrias996 July 19, 2021 at 1:54 pm

    How does it work on multiple Multiplier like Fellhound A1? (100 crit dmg)
    (960+1059) x 1 x 3,06 x 1.1
    or (960+1059) x 1 x 1,7 x 1,7 x 1,1

  14. Kwisats April 15, 2022 at 1:31 pm

    OK I can find a tool on the RSL menu but is that the same as the one HH was talking about and is it not on this website?

  15. Kasbael May 5, 2022 at 9:42 am

    Is there an article that tells you how defense works?

  16. kaisal1 June 28, 2022 at 11:24 pm

    This doesn’t make sense. How is Yannica’s A1 Godlike with a 1.9×2*ATK, while her A2 with a 6.3*ATK is Strong. Thank you in advance for any explanation.

    • Phixion June 29, 2022 at 7:27 am

      because its rated vs other A1’s in the game and her A2 is rated vs other A2’s

  17. Malloran July 27, 2022 at 4:59 pm

    Well this is the damage before mitigation what doesn’t quite inform about the damage really dealt.
    One might say that it is probable that if the damage before mitigation is greater then the damage after mitigation will be greater too.
    But by how much ?
    What is the formula for damage mitigation .

    • Robert Oliver March 13, 2023 at 11:46 pm

      Damage also has a randomness to it such that you will do up to 10% greater or less than the numbers indicated above (Always by a whole %point). i.e. 0.90, 0.91, 0.92, 0.93. 0.94, 0.95 … 1.08, 1.09, 1.1
      EXCEL: =1+(RANDBETWEEN(-10,10)/100)

      Damage mitigation based on the target defence is then applied as another multiplier that means a target could take between 100% and 15% of your damage after randomizing:
      EXCEL: =1-0.85*(1-EXP(-2*the_defence/3000))

      since we can’t do ‘e to the power of’ (EXP) in our heads this translates to:
      Def Damage Mitigation Multiplier
      0 1
      1000 0.5864
      2000 0.3741
      3000 0.2650
      4000 0.2091
      5000 0.1803
      6000 0.1656
      7000 0.1580
      8000 0.1541
      9000 0.1521

  18. sully6262 October 7, 2022 at 4:02 pm

    Why is the damage spreadsheet hidden on this site?

  19. Homey16 January 11, 2023 at 2:34 pm

    Hi! Great site and great info! I have a question about how damage is distributed for AoE and multi-hits: does the total damage apply to reach hit or is it divided amongbthe total hits for a turn? Say a champnhas a total attack of 10000 and attacks 4 enemies an once, or 1 enemy 4 times. Other adustments aside, does each enemy/hit get hit with the entire 10,000 or would it be 2,500 per hit?

    • Robert Oliver March 13, 2023 at 11:55 pm

      Each target takes FULL hits. it is not divided up between them.

      Multiple hit abilities tend to have lower multipliers to compensate for the increased number of hits.

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