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.
Remember that nearby enemies can see which wall you're in.
Look at the line-up of both your team and the enemy's team when picking your form.
The Kassadin Kayn synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Kayn, 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 Kayn. His KDA worsened from NaN to NaN. This drop shows that Kayn helps Kassadin perform worse in ranked League matches. Yet, the small difference indicates that this performance change is not very impactful.
When Kassadin tries to synergize with Kayn, he observes a little increase in his full damage output. This could demonstrate that Kayn supports by providing cover for him to deal more damage or that his presence also helps increase the round's duration. Similarly, when Kassadin is played alongside Kayn 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 Kayn.
Additionally, when Kassadin plays with Kayn on the same team, he on average receives a little more damage than when he fights alone. Taking more damage could indicate that Kayn does a poor job of protecting Kassadin in team fights.
There is no universally accepted best champion pairing for Kassadin that will always be his #1 synergy. Yet, Kayn is a very typical teammate for Kassadin. By locking into the same team as Kassadin, he decreases their win rate by -1.0% to 49.0%. This shows that there is not really a strong bond between Kassadin and Kayn that results in them performing worse together than without each other.
Kayn has a lower difficulty than Kassadin. That means Kassadin players don't need to be very careful when finding Kayn comrades to go into battle on the same side as, as they will have to have a lower level of skill to fight well with you.
Fighting alongside, you should expect to observe an overall large increase in your team’s capacity to destroy wih physical damage. When paired, these champions can provide a great amount of sustained physical damage.
In contrast, by pairing Kassadin and Kayn together, you may not be providing your side very much utility. Make sure to have other champs on your team that offsets this disparity in their playstyle.
Regardless of your Kayn ally's skill level, you should focus on increasing your gold income, outlasting your enemies, and clearing objectives. If you follow these simple suggestions, you should do well, regardless.
If you would like to learn all of the intricacies of Kassadin in order to work well with Kayn during both the lane and mid / late game phases of League of Legends games, you should continue reading to master a few extra tricks and insights into this champion pairing. If you use the build and tips presented above, you will grow your win rate by a lot.
The best finished items to build first in your Kassadin and Kayn synergy build include Malignance, Stormsurge, and Rod of Ages. When Kassadin combined at least these three finished items in his build, he performed much better as an ally of Kayn than with most other commonly used builds. In fact, Kassadin boasted an average win rate of 49.0% helping carry Kayn with these items in his kit.
To have the highest chance of crushing your oponents, you 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 players picked for this team composition, this set of runes resulted in the best win rate. Moreover, these runes gave a 49.0% win rate overall.
If you need to get Kassadin and Kayn synergy tips and stats for a a specific rank, feel free to select one from the selection menu provided above. At first, the statistics and guides given are computed using all matches with data with both champions.