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.
Cast World Ender when you are sure you can force a fight.
Use Umbral Dash while casting The Darkin Blade to increase your chances of hitting the enemy.
Crowd Control abilities like Infernal Chains or your allies' immobilizing effects will help you set up The Darkin Blade.
The Karthus Aatrox synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Aatrox, 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 Aatrox. His KDA fell from NaN to NaN. This fall shows that Aatrox helps Karthus perform not as well in competitive League rounds. Yet, the small difference indicates that this performance change is only marginal.
When Karthus is paired with Aatrox, he sees a little decrease in his full damage output. This change may signal that Aatrox does not provide protection for him to dish out more damage or that his allyship also helps increase the match's duration. Similarly, when Karthus is played together with Aatrox on the same side, he usually scores many fewer killing sprees than when he plays without Aatrox. This is contrasting evidence that he is worse when playing alongside Aatrox.
Additionally, when Karthus plays with Aatrox on the same side, he typically receives a little less damage than when he plays alone. Taking not as much damage could indicate that Aatrox does a decent job of covering Karthus during team fights.
There is no one best companion for Karthus that will 100% of the time be his ideal synergy. However, overall, Aatrox is a good ally for Karthus. By being on the same side as Karthus, he increases their win rate by 1.0% to 48.3%. This clearly indicates that there is a somewhat important synergy between Karthus and Aatrox that results in them performing at the top of their game together than without each other.
Aatrox has a much lower diffuclty than Karthus. That means Karthus players don't need to be careful when lining up Aatrox allies to fight alongside, as they will need a much lower level of skill to play well with you.
Playing cooperatively, Karthus players should expect to witness an overall large increase in your team’s capability to deal magic damage. Together, these champions are able to dish out a surprising amount of magic type damage.
In contrast, by bringing Karthus and Aatrox together, you may not be giving your side very much engage potential. Plan to bring other champs on your team that nullifies this hole in their potential.
Regardless of the ability of your Aatrox ally, you should focus on increasing your income, staying alive by avoiding foolish fights, and taking down objectives. If you do this, you should do well, regardless.
If you would like to learn all of the intricacies of Karthus to synergize with Aatrox during both the lane and mid / late game phases of League games, you should keep reading to master additional tips and tricks for this champion pairing. If you use the build and tips presented here, you should grow your win rate by a lot.
The ideal items to have in your Karthus and Aatrox synergy build consist of Rabadon's Deathcap, Malignance, and Stormsurge. When Karthus used at least these three pieces in his build, he did a lot better when fighting alongside Aatrox than with most other commonly used builds. In fact, Karthus boasted an average win rate of 48.3% when playing alongside Aatrox with these items in his kit.
To have the highest likelihood of vanquishing your oponents, Karthus players should equip the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Eyeball Collection, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune combinations players picked for this team composition, this mix of runes yielded the best win rate. Notably, these runes gave a 48.3% win rate overall.
If you want to get Karthus and Aatrox synergy tips and builds for a a distinct rank, feel free to select one from the selection menu displayed above. By default, the stats and strategies shown are calculated using every round with data with both champs.