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.
Defiant Dance is not interrupted by crowd control, try timing it for incoming disables.
Flawless Duet does not have a maximum travel distance, try using it in creative ways.
Use Bladesurge to cover great distances by targeting low life minions on your way to champion targets.
The Kai'Sa Irelia synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Irelia, 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 Irelia. His KDA fell from NaN to NaN. This negative change shows that Irelia helps Kai'Sa perform poorer in competitive LoL rounds. Yet, the small difference indicates that this performance change is not very impactful.
When Kai'Sa plays on the same team as Irelia, she sees a little drop in her total damage output. This difference could signal that Irelia does not provide cover for her to deal more damage or that her support also helps increase the round's duration. Similarly, when Kai'Sa is played alongside Irelia on the same side, he usually scores many fewer killing sprees than when she plays without Irelia. This is contrasting evidence that she is worse when playing synergisticly with Irelia.
Additionally, when Kai'Sa plays with Irelia on the same side, she often receives a little less damage than when she fights alone. Taking not as much damage could indicate that Irelia does a decent job of protecting Kai'Sa in teamfights.
There is no one best companion for Kai'Sa that will always be her ideal teammate. However, Irelia is a very typical teammate for Kai'Sa. By locking into the same side as Kai'Sa, she lowers their win rate by -0.3% to 46.2%. This clearly indicates that there is a weak strategic relationship between Kai'Sa and Irelia that allows them to perform not as well together than alone.
Irelia has a lower difficulty than Kai'Sa. That means you don't need to be very careful when lining up Irelia comrades to fight alongside, as they will require a lower level of skill to play well with you.
When playing on the same side, you should expect to observe an overall large increase in your team’s ability to dish out massive AD. Combined, these champions can tear through the other team with a lot of physcial damage.
Conversely, by bringing Kai'Sa and Irelia together, you will not be granting your side a great deal of support. Make sure to include other champions on your team that neutralizes this hole in their playstyle.
Regardless of the skill of your Irelia ally, you should focus on increasing your income, outlasting your enemies, and clearing objectives. If you follow these simple suggestions, you should do well anyway.
If you would like to truly master Kai'Sa in order to work well with Irelia during both the laning and mid / late game phases of LoL games, you should keep reading to gather a few extra tips and tricks for this champion pairing. If you mind the build and tips shown above, you will grow your win rate by a lot.
The most important finished items to focus on in your Kai'Sa and Irelia synergy build consist of Guinsoo's Rageblade, Zhonya's Hourglass, and Kraken Slayer. When Kai'Sa incorporated at least these three great items in her build, she did significantly better when paired up with Irelia than with most other common builds. In fact, Kai'Sa had an average win rate of 46.2% helping carry Irelia with this build.
To have the best probability of crushing your oponents, Kai'Sa players should take the Hail of Blades, Taste of Blood, Eyeball Collection, Treasure Hunter, Biscuit Delivery, and Magical Footwear runes from the Domination and Inspiration rune sets. Of all the rune combinations players chose for this champion pairing, this composite of runes yielded the greatest win rate. Moreover, these runes provided a 46.2% winrate overall.
If you need to see Kai'Sa and Irelia synergy tips and builds for a a particular division rank, feel free to choose one from the selection menu above. If viewing for the first time, the statistics and build suggestions displayed are calculated using every round finished with both champs.