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.
Jax benefits greatly from items that have both Ability Power and Attack Damage such as Guinsoo's Rageblade and Hextech Gunblade.
Jax can Leap Strike to friendly units, including wards. You can use them to plan your escape.
The Kai'Sa Jax synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Jax, 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 large worsening in her KDA (ratio of kills and assists to deaths) when paired with Jax. His KDA worsened from NaN to NaN. This negative change shows that Jax helps Kai'Sa perform worse in ranked LoL rounds. Yet, the small difference shows that this performance change is only marginal.
When Kai'Sa is paired with Jax, she sees a little drop in her total damage dealt. This difference may signal that Jax does not help cover for her to dish out more damage or that his support also helps increase the game's duration. Similarly, when Kai'Sa is played together with Jax on the same side, he usually scores many fewer killing sprees than when she plays alone. This is contrasting evidence that she is worse when playing alongside Jax.
Additionally, when Kai'Sa plays with Jax on the same team, she on average receives a little less damage than when she plays alone. Taking not as much damage may indicate that Jax does a decent job of protecting Kai'Sa in team fights.
There is no top synergy for Kai'Sa that will 100% of the time be her top synergy. Yet, Jax is a pretty good teammate for Kai'Sa. By playing on the same team as Kai'Sa, he raises their win rate by 1.3% to 47.8%. This shows that there is a potentially meaningful strategic relationship between Kai'Sa and Jax that allows them to perform better together than alone.
Jax has a lower difficulty than Kai'Sa. That means you don't need to be very careful when finding Jax teammates to fight alongside, as they will require a lower level of skill to play well with you.
Playing alongside, Kai'Sa players should see an overall large increase in your team’s ability to deal physical damage. Together, these two can provide a great amount of sustained physical damage.
Conversely, by grouping Kai'Sa and Jax together, you may not be providing your other allies a lot of support. We recommend you pick other champions on your team that nullifies this hole in their playstyle.
Regardless of your Jax ally's skill level, you need to focus on maximizing your gold income, outlasting your enemies, and clearing objectives. If you heed this simple advice, you should do well, regardless.
To truly master Kai'Sa to pair well with Jax during both the early game and mid / late game phases of League of Legends games, you should keep reading to master some more lessons on this champion pairing. If you use the build and tips shown above, you will grow your win rate by a lot.
The best finished items to include in your Kai'Sa and Jax synergy build include Zhonya's Hourglass, Terminus, and Kraken Slayer. When Kai'Sa bought at least these three pieces in her build, she performed much better when paired up with Jax than with most other commonly used item sets. In fact, Kai'Sa boasted an average win rate of 47.8% when synergizing her build and playstyle to Jax with these items in her kit.
To have the highest likelihood of beating your oponents, Kai'Sa players should use the Lethal Tempo, Triumph, Legend: Bloodline, Coup de Grace, Magical Footwear, and Biscuit Delivery runes from the Precision and Inspiration rune sets. Out of all the rune combinations players used for Kai'Sa and Jax pairings, this composite of runes resulted in the top win rate. In fact, these runes provided a 47.8% win rate overall.
By default, tips, stats, and builds on how to team up Jax with Kai'Sa are presented for all ranked divisions. If you want to filter the statistics and builds to an individual player tier, you should use the selection menu at the top of this page.