Take advantage of Flurry by weaving in basic attacks between spell casts - this maximizes damage output and minimizes Energy loss.
Self-casting Safeguard and using Iron Will are powerful tools for killing neutral monsters (in the jungle).
Use Sonic Wave before Dragon's Rage so you can chase the target with Resonating Strike.
Despair is very effective against other tanks, so make sure you're in range of opponents with the highest Health.
Amumu is highly dependent on teammates, so try laning with your friends for maximum effectiveness.
Cooldown Reduction on Amumu is very strong, but it's often difficult to itemize for it. Grab the Golem buff whenever possible to gain Cooldown Reduction without sacrificing stats.
The Lee Sin Amumu synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Amumu, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Lee Sin sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Amumu. His KDA fell from NaN to NaN. This negative change shows that Amumu helps Lee Sin perform worse in ranked LoL rounds. Yet, the small difference demonstrates that this performance change is not very impactful.
When Lee Sin is paired with Amumu, he sees a clear improvement in his full damage output. This may demonstrate that Amumu helps provide cover for him to dish out more damage or that his allyship also helps extend the round's duration. Similarly, when Lee Sin is played alongside Amumu on the same side, he usually scores many fewer killing sprees compared to when he plays on his own. This is contrasting evidence that he is worse when playing with Amumu.
Moreover, when Lee Sin plays with Amumu on the same side, he typically receives a little less damage than when he plays alone. Taking not as much damage could mean that Amumu does a decent job of covering Lee Sin in teamfights.
There is no universally accepted best ally for Lee Sin that will no matter what be his best teammate. Yet, overall, Amumu is a very typical ally for Lee Sin. By being on the same team as Lee Sin, he improves their win rate by 0.5% to 47.8%. This signals that there is only a small bond between Lee Sin and Amumu that results in them performing at the top of their game together than without each other.
Amumu has a much lower diffuclty than Lee Sin. That means Lee Sin players don't need to be careful when finding Amumu allies to fight alongside, as they will have to have a much lower level of skill to be able to cooperate well with you.
Working together, Lee Sin players should expect to see an overall large increase in your team’s ability to buff allies and debuff enemies. Combined, these champs will help their other teammates secure a victory.
Conversely, by aligning Lee Sin and Amumu together, you will not be granting your side a lot of attack damage. Plan to pick other champs on your team that fills this relative hole in their capabilities.
Regardless of your Amumu ally's ability, you should focus on increasing your gold income, warding to avoid ambushes, and taking down objectives. If you follow these simple suggestions, you should do well, regardless.
To learn all of the intricacies of Lee Sin to synergize with Amumu during both the early game and mid / late game phases of LoL, you should continue reading to gather some more tips and tricks for this champion pairing. If you pay attention to the build and stats presented above, you should increase your win rate significantly.
The top items to build first in your Lee Sin and Amumu synergy build consist of Sterak's Gage, Black Cleaver, and Sundered Sky. When Lee Sin used at least these three great items in his build, he performed a lot better when paired up with Amumu than with many other commonly used builds. In fact, Lee Sin boasted an average winrate of 47.8% when synergizing his build and playstyle to Amumu with this build.
To have the greatest probability of crushing your oponents, Lee Sin players should equip the Conqueror, Triumph, Legend: Alacrity, Coup de Grace, Cosmic Insight, and Magical Footwear runes from the Precision and Inspiration rune sets. Out of all the rune combinations players chose for this champion pairing, this order of runes resulted in the greatest win rate. Notably, these runes gave a 47.8% win rate overall.
By default, tips, stats, and builds on how to pair Amumu with Lee Sin are displayed for all skill levels combined. If you want to narrow the statistics and builds to a particular rank, you should use the selection menu earlier in the counter matchup guide.