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.
Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
The Lee Sin Kassadin synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Kassadin, 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 very large drop in his KDA (ratio of kills and assists to deaths) when paired with Kassadin. His KDA went down from NaN to NaN. This fall shows that Kassadin helps Lee Sin perform poorer in ranked League of Legends games. Yet, the small difference indicates that this performance change is not very impactful.
When Lee Sin is paired with Kassadin, he sees a barely noticable drop in his full damage dealt. This change may demonstrate that Kassadin does not help cover for him to dish out more damage or that his presence also helps increase the round's duration. Similarly, when Lee Sin is played alongside Kassadin on the same team, he usually scores many fewer killing sprees than when he plays on his own. This is contrasting evidence that he is worse when playing with Kassadin.
Additionally, when Lee Sin plays with Kassadin on the same team, he often takes a little less damage than when he fights alone. Receiving not as much damage could mean that Kassadin does a decent job of covering Lee Sin in team fights.
There is no one best companion for Lee Sin that will always be his top synergy. However, Kassadin is a very typical ally for Lee Sin. By playing on the same side as Lee Sin, he decreases their win rate by -0.6% to 46.7%. This clearly indicates that there is only a small bond between Lee Sin and Kassadin that allows them to perform not as well together than alone.
Kassadin has a greater difficulty than Lee Sin. That means Lee Sin players must be careful when lining up Kassadin teammates to fight alongside, as they will require a greater level of skill to be able to play well with you.
Fighting alongside, you should expect to see an overall large increase in your team’s capacity to dish out massive AD. When paired, these two can provide a great amount of sustained physical damage.
In contrast, by aligning Lee Sin and Kassadin together, you probably will not be giving your side a great deal of support. Plan to include other champs on your team that offsets this disparity in this pairing's kit.
Regardless of the skill of your Kassadin ally, you should focus on maximizing your income, outlasting your enemies, and taking down objectives. If you heed this simple advice, you will do well anyway.
If you would like to learn all of the intricacies of Lee Sin in order to pair well with Kassadin during both the lane and mid / late game phases of LoL games, you should continue reading to gather additional lessons on this champion pairing. If you listen to the build and suggestions presented here, you will increase your win rate significantly.
The ideal items to include in your Lee Sin and Kassadin synergy build include Black Cleaver, Sundered Sky, and Eclipse. When Lee Sin combined at least these three finished items in his build, he did much better when paired up with Kassadin than with many other common item sets. In fact, Lee Sin boasted an average win rate of 46.7% when synergizing his build and playstyle to Kassadin with these items in his kit.
To have the highest chance of defeating your oponents, you should equip the Conqueror, Triumph, Legend: Alacrity, Coup de Grace, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Of all the rune combinations that we analyzed for Lee Sin and Kassadin pairings, this blending of runes yielded the top win rate. Notably, these runes averaged a 46.7% win rate overall.
By default, tips, stats, and builds on how to synergize Kassadin with Lee Sin are displayed for all ranked divisions combined. To scope the statistics and builds to a particular skill level, you may use the selection menu located above.