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.
Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
The Kayn Karthus synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Karthus, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Kayn sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA worsened from NaN to NaN. This decrease shows that Karthus helps Kayn perform worse in ranked LoL rounds. Yet, the small difference shows that this performance change is only marginal.
When Kayn tries to synergize with Karthus, he gets a sizeable uptick in his complete damage dealt. This difference could indicate that Karthus helps provide protection for him to dish out more damage or that his presence on the team also helps extend the round's duration. Similarly, when Kayn is played together with Karthus 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 synergisticly with Karthus.
Additionally, when Kayn plays with Karthus on the same team, he on average receives a little more damage than when he fights alone. Taking more damage may mean that Karthus does a poor job of covering Kayn in team fights.
There is no top synergy for Kayn that will 100% of the time be his top ally. Yet, overall, Karthus is a decent ally for Kayn. By locking into the same team as Kayn, he increases their win rate by 1.3% to 50.5%. This clearly indicates that there is a somewhat important synergy between Kayn and Karthus that results in them performing better together than without each other.
Karthus has a lower difficulty than Kayn. That means Kayn players don't need to be careful when lining up Karthus allies to play with, as they will have to have a relatively low level of skill to play well with you.
Playing alongside, you should expect to witness an overall large increase in your team’s capacity to dish out massive AD. Together, these two can tear through the other team with a lot of physcial damage.
Conversely, by pairing Kayn and Karthus together, you probably will not be providing your side very much support. Make sure to include other champs on your team that offsets this hole in their playstyle.
Regardless of the skill of your Karthus teammate, you need to focus on maximizing your income, warding to avoid ambushes, and taking down objectives. If you do this, you should do well anyway.
To learn all of the intricacies of Kayn to work well with Karthus during both the early game and mid / late game phases of League of Legends, you should continue reading to pick up some more tips and tricks for this champion pairing. If you use the build and tips presented above, you should increase your win rate significantly.
The most crucial items to prioritize in your Kayn and Karthus synergy build consist of Serylda's Grudge, Hubris, and Profane Hydra. When Kayn bought at least these three items in his build, he performed a lot better when fighting alongside Karthus than with many other commonly used item sets. In fact, Kayn boasted an average winrate of 50.5% when playing alongside Karthus with these items in his kit.
To have the greatest chance of vanquishing your oponents, you should take the Conqueror, Triumph, Legend: Tenacity, Last Stand, Cosmic Insight, and Magical Footwear runes from the Precision and Inspiration rune sets. Of all the rune builds players picked for this champion pairing, this blending of runes resulted in the highest win rate. Moreover, these runes provided a 50.5% win rate overall.
If you want to view Kayn with Karthus cooperations tips and stats for a an individual division, feel free to choose one from the selection menu provided above. If viewing for the first time, the statistics and build suggestions shown are calculated using all matches with data with both champs.