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.
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 Kassadin Rengar synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Rengar, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Kassadin sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Rengar. His KDA worsened from NaN to NaN. This worsening shows that Rengar helps Kassadin perform worse in ranked League rounds. Yet, the small difference indicates that this performance change is not very impactful.
When Kassadin is an ally to Rengar, he gets a barely noticable drop in his total damage output. This difference could signal that Rengar does not support by providing protection for him to deal more damage or that his participation also helps increase the round's duration. Similarly, when Kassadin is played with Rengar on the same side, he usually scores many fewer killing sprees compared to when he plays on his own. This is contrasting evidence that he is worse when playing alongside Rengar.
Moreover, when Kassadin plays with Rengar on the same side, he often takes a little less damage than when he plays alone. Taking not as much damage could indicate that Rengar does a decent job of covering Kassadin during teamfights.
There is no ideal companion for Kassadin that will always be his best ally. However, Rengar is a very typical ally for Kassadin. By locking into the same team as Kassadin, he lowers their win rate by -0.1% to 49.9%. This proves that there is only a small strategic relationship between Kassadin and Rengar that results in them performing worse together than alone.
Rengar has a lower difficulty than Kassadin. That means you don't need to be very careful when lining up Rengar allies to play with, as they will have to have a lower level of skill to be able to fight well with you.
Playing cooperatively, you should expect to see an overall large increase in your team’s ability to dish out massive AD. Together, these champions can provide a great amount of sustained physical damage.
Conversely, by aligning Kassadin and Rengar together, you will not be granting your side very much crowd control. Make sure to have other champions on your team that helps cover this relative gap in their playstyle.
Regardless of the ability of your Rengar ally, you need to focus on increasing your gold income, outlasting your enemies, and taking down objectives. If you do this, you will do well, regardless.
If you would like to learn all of the intricacies of Kassadin to pair well with Rengar during both the early game and mid / late game phases of League of Legends matches, you should keep reading to gather a few extra tips and tricks for this champion pairing. If you use the build and stats shown above, you will increase your win rate significantly.
The best items to focus on in your Kassadin and Rengar synergy build include Seraph's Embrace, Luden's Companion, and Rod of Ages. When Kassadin incorporated at least these three great items in his build, he performed significantly better when paired up with Rengar than with most other common builds. In fact, Kassadin boasted an average win rate of 49.9% when synergizing his build and playstyle to Rengar with this build.
To have the highest likelihood of defeating your oponents, Kassadin players should use the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Of all the rune builds we have analyed for this team composition, this mix of runes resulted in the top win rate. Moreover, these runes gave a 49.9% winrate overall.
By default, tips, statistics, and builds on how to synergize Rengar with Kassadin are displayed for every ranked division. To narrow the stats and builds to a specific rank, you may use the selection menu earlier in the counter matchup guide.