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.
Use Subjugate to soften a powerful enemy tank or to create a target for your team to focus fire.
Trundle excels at fighting within his Frozen Domain. Try to draw enemies onto it.
Chomp is good for lowering the physical damage of enemies; try to focus it on enemy physical damage dealers.
The Karthus Trundle synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Trundle, 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 Trundle. His KDA worsened from NaN to NaN. This decrease shows that Trundle helps Karthus perform worse in ranked League rounds. Yet, the small difference proves that this performance change is only marginal.
When Karthus is paired with Trundle, he sees a little decrease in his total damage output. This difference may indicate that Trundle does not support by providing cover for him to dish out more damage or that his participation also helps extend the match's duration. Similarly, when Karthus is played together with Trundle on the same team, he usually scores many fewer killing sprees than when he plays on his own. This is contrasting evidence that he is worse when playing alongside Trundle.
Additionally, when Karthus plays with Trundle on the same team, he typically receives a little less damage than when he plays alone. Receiving not as much damage could indicate that Trundle does a decent job of covering Karthus during teamfights.
There is no one best ally for Karthus that will no matter what be his #1 teammate. However, Trundle is a great companion for Karthus. By being on the same side as Karthus, he improves their win rate by 3.9% to 51.2%. This proves that there is a very strong bond between Karthus and Trundle that allows them to perform better together than alone.
Trundle has a lower difficulty than Karthus. That means you don't need to be cautious when lining up Trundle allies to go into battle on the same side as, as they will need a relatively low level of skill to cooperate well with you.
Fighting cooperatively, you will likely observe an overall large increase in your team’s ability to deal magical damage. Combined, these champs can blast through enemies with magic damage.
Although, by grouping Karthus and Trundle together, you will not be providing your other teammates very much protection for burst damage. Make sure to include other champions on your team that nullifies this gap in their abilities.
Regardless of your Trundle ally's ability, you should focus on increasing 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 in order to pair well with Trundle during both the laning and mid / late game phases of LoL matches, you should continue reading to pick up a few extra tricks and insights into this champion pairing. If you listen to the build and suggestions shown above, you should increase your win rate significantly.
The most crucial finished items to have in your Karthus and Trundle synergy build include Rabadon's Deathcap, Malignance, and Shadowflame. When Karthus included at least these three items in his build, he performed significantly better when fighting alongside Trundle than with many other common item sets. In fact, Karthus had an average win rate of 51.2% when playing alongside Trundle with these items in his kit.
To have the best probability of beating your oponents, you should take the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Presence of Mind, and Last Stand runes from the Domination and Precision rune sets. Of all the rune sets that we analyzed for this champion pairing, this mixture of runes yielded the best win rate. Notably, these runes averaged a 51.2% winrate overall.
By default, tips, statistics, and builds on how to team up Trundle with Karthus are given for all skill levels combined. If you want to narrow the statistics and builds to a distinct division, you can use the selection menu earlier in the counter matchup guide.