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.
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 Kassadin Jax synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Jax, 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 large worsening in his KDA (ratio of kills and assists to deaths) when paired with Jax. His KDA went down from NaN to NaN. This decrease shows that Jax helps Kassadin perform not as well in competitive LoL games. Yet, the small difference shows that this performance change is not very impactful.
When Kassadin is an ally to Jax, he observes a little increase in his complete damage output. This difference may demonstrate that Jax helps provide cover for him to dish out more damage or that his participation also helps increase the game's duration. Similarly, when Kassadin is played alongside Jax on the same side, he usually scores many fewer killing sprees compared to when he plays without Jax. This is contrasting evidence that he is worse when playing with Jax.
Moreover, when Kassadin plays with Jax on the same team, he usually receives a little less damage than when he fights alone. Getting dealt not as much damage may mean that Jax does a decent job of protecting Kassadin in teamfights.
There is no one best champion pairing for Kassadin that will always be his top teammate. Yet, overall, Jax is a good teammate for Kassadin. By playing on the same team as Kassadin, he increases their win rate by 1.6% to 51.6%. This demonstrates that there is a somewhat important synergy between Kassadin and Jax that results in them performing at the top of their game together than alone.
Jax has a much lower diffuclty than Kassadin. That means you don't need to be very careful when enlisting Jax teammates to go into battle on the same side as, as they will need a much lower level of skill to fight well with you.
Fighting cooperatively, Kassadin players should see an overall large increase in your team’s ability to deal magical damage. When paired, these two can blast through enemies with magic damage.
Conversely, by bringing Kassadin and Jax together, you will not be granting your other teammates very much crowd control. Make sure to include other champs on your team that nullifies this relative gap in their playstyle.
Regardless of the skill of your Jax teammate, you need to focus on increasing your gold income, outlasting your enemies, and clearing objectives. If you do this, you will do well, regardless.
If you would like to truly master Kassadin in order to work well with Jax during both the early game and mid / late game phases of League of Legends games, you should continue reading to pick up some more lessons on this champion pairing. If you use the build and tips shown here, you will grow your win rate significantly.
The most crucial finished items to use in your Kassadin and Jax synergy build consist of Rabadon's Deathcap, Malignance, and Rod of Ages. When Kassadin used at least these three pieces in his build, he performed a lot better when fighting alongside Jax than with many other typical builds. In fact, Kassadin boasted an average winrate of 51.6% helping carry Jax with these items in his kit.
To have the best chance of beating your oponents, you should equip the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune combinations players picked for Kassadin and Jax pairings, this combination of runes resulted in the highest win rate. In fact, these runes provided a 51.6% winrate overall.
If you want to get Kassadin and Jax collaboration tips and builds for a a distinct player tier, please choose one from the selection menu shown above. If viewing for the first time, the statistics and guides given are calculated using all games played with these champions.