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.
Chaaaaaaaarge!!! can be cast at a great range. Try and predict where the enemy team will be by the time you reach them.
The last hit of Violent Tendencies deals more damage than the first three - make sure you hit it!
Kled generates some courage by killing minions, but gets much more from fighting Champions.
The Karthus Kled synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Kled, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Karthus sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Kled. His KDA fell from NaN to NaN. This drop shows that Kled helps Karthus perform worse in ranked League matches. Yet, the small difference demonstrates that this performance change is not very impactful.
When Karthus plays on the same team as Kled, he gets a small decrease in his full damage output. This change may demonstrate that Kled doesn't help cover for him to deal more damage or that his presence also helps extend the game's duration. Similarly, when Karthus is played together with Kled on the same side, he usually scores many fewer killing sprees compared to when he plays without Kled. This is contrasting evidence that he is worse when playing synergisticly with Kled.
Moreover, when Karthus plays with Kled on the same team, he typically receives a little less damage than when he plays alone. Receiving not as much damage may mean that Kled does a decent job of protecting Karthus during team fights.
There is no one best companion for Karthus that will always be his best teammate. However, overall, Kled is a superb companion for Karthus. By locking into the same side as Karthus, he improves their win rate by 5.6% to 52.9%. This shows that there is a very real bond between Karthus and Kled that results in them performing at the top of their game together than alone.
Kled has a lower difficulty than Karthus. That means Karthus players don't need to be very careful when lining up Kled allies to go into battle on the same side as, as they will need a relatively low level of skill to be able to play well with you.
Fighting together, you should expect to observe an overall large increase in your team’s ability to to do a lot of AP damage. Combined, these champs can deal quite a lot of AP type damage.
Although, by pairing Karthus and Kled together, you may not be granting your side a lot of engage potential. Make sure to have other champions on your team that fills this disparity in this pairing's capabilities.
Regardless of the ability of your Kled teammate, you need to focus on maximizing your income, outlasting your enemies, and taking down objectives. If you heed this simple advice, you will do well anyway.
If you would like to truly master Karthus to work well with Kled during both the laning and mid / late game phases of League, you should continue reading to pick up a few extra tips and tricks for this champion pairing. If you pay attention to the build and stats presented here, you will increase your win rate significantly.
The most important finished items to focus on in your Karthus and Kled synergy build consist of Malignance, Stormsurge, and Liandry's Torment. When Karthus used at least these three items in his build, he performed much better when paired up with Kled than with most other commonly used builds. In fact, Karthus had an average winrate of 52.9% helping carry Kled with these items in his kit.
To have the greatest likelihood of beating your oponents, you should use the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Gathering Storm, and Transcendence runes from the Domination and Sorcery rune sets. Out of all the rune combinations players used for this team composition, this composite of runes yielded the top win rate. Notably, these runes provided a 52.9% winrate overall.
By default, tips, stats, and builds on how to synergize Kled with Karthus are shown for all ranked divisions combined. If you would like to scope the statistics and builds to a specific skill level, you should use the selection menu located earlier in the counter matchup guide.