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.
Make sure to take paths through brush when chasing opponents to take advantage of Rengar's passive.
Use Rengar's ultimate to find and assassinate high priority targets in team fights and skirmishes.
A lot of Rengar's power comes from empowered abilities he uses at the right moment - choose wisely!
The Kai'Sa Rengar synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Rengar, 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 Rengar. His KDA fell from NaN to NaN. This negative change shows that Rengar helps Kai'Sa perform poorer in ranked League of Legends games. Yet, the small difference indicates that this performance change is only marginal.
When Kai'Sa is an ally to Rengar, she observes a barely noticable drop in her total damage output. This change may indicate that Rengar does not provide cover for her to dish out more damage or that his allyship also helps increase the game's duration. Similarly, when Kai'Sa is played with Rengar 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 synergisticly with Rengar.
Moreover, when Kai'Sa plays with Rengar on the same side, she on average receives a little less damage than when she fights alone. Taking not as much damage may indicate that Rengar does a decent job of covering Kai'Sa during team fights.
There is no universally accepted best companion for Kai'Sa that will no matter what be her ideal ally. Yet, Rengar is a relatively poor companion for Kai'Sa. By playing on the same side as Kai'Sa, he decreases their win rate by -1.6% to 44.9%. This clearly indicates that there is a harmful bond between Kai'Sa and Rengar that results in them performing not as well together than without each other.
Rengar has a greater difficulty than Kai'Sa. That means Kai'Sa players must be very careful when arranging Rengar comrades to fight alongside, as they will require a greater level of skill to be able to work well with you.
Working together, Kai'Sa players should observe an overall large increase in your team’s ability to dish out massive AD. Together, these champions can tear through the other team with a lot of physcial damage.
Conversely, by aligning Kai'Sa and Rengar together, you probably will not be granting your other allies much support. Plan to include other champs on your team that fills this hole in this pairing's potential.
Regardless of your Rengar ally's skill level, you need to focus on maximizing your income, warding to avoid ambushes, and clearing objectives. If you do this, you will do well, regardless.
If you would like to truly master Kai'Sa in order to work well with Rengar during both the early game and mid / late game phases of League of Legends, you should keep reading to gather additional tricks and insights into this champion pairing. If you listen to the build and stats displayed above, you will increase your win rate by a lot.
The top items to prioritize in your Kai'Sa and Rengar synergy build include Guinsoo's Rageblade, Zhonya's Hourglass, and Terminus. When Kai'Sa included at least these three pieces in her build, she performed a lot better when fighting alongside Rengar than with most other common builds. In fact, Kai'Sa boasted an average winrate of 44.9% helping carry Rengar with this build.
To have the best chance of crushing your oponents, you should equip 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 Kai'Sa and Rengar pairings, this combination of runes yielded the highest win rate. Notably, these runes averaged a 44.9% winrate overall.
If you want to get Kai'Sa with Rengar cooperations tips and builds for a a distinct rank, feel free to select one from the selection menu shown above. By default, the stats and build suggestions given are computed using all games played with both champions.