Make sure to buy items that will evolve at least 1 or 2 of your spells.
Work with your teammates to set up your Ultimate and optimize damage with your passive.
Try to catch enemy carries alone to burst them with Icathian Rain.
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.
The Kai'Sa Lee Sin synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Lee Sin, compared to her overall stats. Significant differences are areas of focus that highlight how her gameplay changes when paired with this other champion.
Overall, Kai'Sa sees a very large drop in her KDA (ratio of kills and assists to deaths) when paired with Lee Sin. His KDA fell from NaN to NaN. This negative change shows that Lee Sin helps Kai'Sa perform not as well in competitive LoL games. Yet, the small difference shows that this performance change is only marginal.
When Kai'Sa is paired with Lee Sin, she gets a little decrease in her total damage dealt. This difference could indicate that Lee Sin does not support by providing cover for her to deal more damage or that his support also helps increase the match's duration. Similarly, when Kai'Sa is played with Lee Sin on the same side, he usually scores many fewer killing sprees compared to when she plays on his own. This is contrasting evidence that she is worse when playing synergisticly with Lee Sin.
Additionally, when Kai'Sa plays with Lee Sin on the same side, she usually receives a little less damage than when she fights alone. Taking not as much damage could mean that Lee Sin does a decent job of covering Kai'Sa during teamfights.
There is no universally accepted best ally for Kai'Sa that will always be her best synergy. However, overall, Lee Sin is a terrible companion for Kai'Sa. By playing on the same side as Kai'Sa, he drops their win rate by -3.7% to 42.8%. This shows that there is a terrible bond between Kai'Sa and Lee Sin that results in them performing worse together than alone.
Lee Sin has a lower difficulty than Kai'Sa. That means Kai'Sa players don't need to be very careful when lining up Lee Sin allies to play with, as they will require a lower level of skill to be able to fight well with you.
When playing together, you will likely see an overall large increase in your team’s capability to dish out massive AD. Together, these champs can provide a great amount of sustained physical damage.
Conversely, by grouping Kai'Sa and Lee Sin together, you will not be providing your team very much support. We recommend you pick other champions on your team that helps cover this gap in this pairing's potential.
Regardless of your Lee Sin ally's skill level, you need to focus on maximizing your income, warding to avoid ambushes, and taking down objectives. If you heed this simple advice, you should do well, regardless.
If you would like to truly master Kai'Sa to pair well with Lee Sin during both the laning and mid / late game phases of League of Legends, you should continue reading to learn some more tips and tricks for this champion pairing. If you pay attention to the build and tips presented here, you should grow your win rate significantly.
The most important items to prioritize in your Kai'Sa and Lee Sin synergy build include Guardian Angel, Terminus, and Kraken Slayer. When Kai'Sa combined at least these three pieces in her build, she did much better when fighting alongside Lee Sin than with most other common builds. In fact, Kai'Sa had an average winrate of 42.8% helping carry Lee Sin with these items in her kit.
To have the greatest chance of coming out on top against your oponents, you should take the Lethal Tempo, Presence of Mind, Legend: Bloodline, Coup de Grace, Biscuit Delivery, and Magical Footwear runes from the Precision and Inspiration rune sets. Out of all the runes players picked for Kai'Sa and Lee Sin pairings, this mixture of runes yielded the greatest win rate. Notably, these runes averaged a 42.8% win rate overall.
By default, tips, statistics, and builds on how to pair Lee Sin with Kai'Sa are given for all skill levels combined. To filter the stats and builds to a particular player tier, you can use the selection menu earlier on the page.