Last Breath can be cast on any target that is knocked Airborne, even by one of your allies.
Dash through a minion to have Sweeping Blade available to chase your opponent should they flee; Dash directly to your opponent to preserve a minion as your escape route.
At level 18, Yasuo's Steel Tempest reaches its Attack Speed cap with 55% Attack Speed from items.
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 Yasuo 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, Yasuo sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA decreased from NaN to NaN. This worsening shows that Karthus helps Yasuo perform not as well in ranked League of Legends matches. Yet, the small difference demonstrates that this performance change is not very impactful.
When Yasuo plays on the same team as Karthus, he gets a marginal improvement in his total damage output. This difference could demonstrate that Karthus provides protection for him to deal more damage or that his allyship also helps extend the game's duration. Similarly, when Yasuo is played together with Karthus on the same side, he usually scores many fewer killing sprees than when he plays without Karthus. This is contrasting evidence that he is worse when playing alongside Karthus.
Additionally, when Yasuo plays with Karthus on the same side, he often takes more damage than when he plays alone. Taking more damage may mean that Karthus does a poor job of protecting Yasuo in teamfights.
There is no one best synergy for Yasuo that will 100% of the time be his best ally. However, Karthus is a very typical ally for Yasuo. By playing on the same side as Yasuo, he decreases their win rate by -0.3% to 50.3%. This proves that there is only a small strategic relationship between Yasuo and Karthus that results in them performing not as well together than without each other.
Karthus has a much lower diffuclty than Yasuo. That means you don't need to be very careful when arranging Karthus allies to fight alongside, as they will need a much lower level of skill to be able to work well with you.
When playing on the same side, you will likely observe an overall large increase in your team’s ability to deal magical damage. Combined, these two are able to dish out a surprising amount of magic type damage.
In contrast, by bringing Yasuo and Karthus together, you probably will not be giving your other allies much engage. Make sure to have other champions on your team that helps cover this relative hole in their kit.
Regardless of your Karthus ally's skill level, you need to focus on maximizing your gold income, outlasting your enemies, and taking down objectives. If you do this, you should do well anyway.
If you would like to truly master Yasuo to work well with Karthus during both the lane and mid / late game phases of League of Legends games, you should continue reading to master some more tips and tricks for this champion pairing. If you pay attention to the build and tips displayed above, you should increase your win rate by a lot.
The most important items to have in your Yasuo and Karthus synergy build include Guardian Angel, Kraken Slayer, and Immortal Shieldbow. When Yasuo used at least these three items in his build, he did significantly better as an ally of Karthus than with most other typical item sets. In fact, Yasuo boasted an average winrate of 50.3% helping carry Karthus with this build.
To have the highest likelihood of vanquishing your oponents, you should use the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Second Wind, and Overgrowth runes from the Precision and Resolve rune sets. Out of all the rune builds that we analyzed for this team composition, this set of runes yielded the highest win rate. In fact, these runes gave a 50.3% win rate overall.
If you need to see Yasuo and Karthus collaboration tips and builds for a a distinct rank, please select one from the selection menu shown above. At first, the statistics and guides displayed are computed using all games completed with these champions.