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.
You can use Comet of Legend's flight to grow Starsurge to massive proportions.
Comet of Legend allows you to move quickly around the map; use it to put pressure on other lanes.
Save Voice of Light to use as a defense against melee opponents if you need to - otherwise, use its slow to start a fight at long range.
The Karthus Aurelion Sol synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Aurelion Sol, 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 very large drop in his KDA (ratio of kills and assists to deaths) when paired with Aurelion Sol. His KDA went down from NaN to NaN. This fall shows that Aurelion Sol helps Karthus perform poorer in competitive League rounds. Yet, the small difference indicates that this performance change is not very impactful.
When Karthus plays on the same team as Aurelion Sol, he sees a little drop in his total damage output. This change may signal that Aurelion Sol does not provide cover for him to dish out more damage or that his support also helps extend the round's duration. Similarly, when Karthus is played with Aurelion Sol on the same side, he usually scores many fewer killing sprees compared to when he plays without Aurelion Sol. This is contrasting evidence that he is worse when playing alongside Aurelion Sol.
Moreover, when Karthus plays with Aurelion Sol on the same team, he usually takes a little more damage than when he plays alone. Taking more damage could mean that Aurelion Sol does a poor job of protecting Karthus in team fights.
There is no perfect champion pairing for Karthus that will always be his best synergy. Yet, overall, Aurelion Sol is a great companion for Karthus. By being on the same team as Karthus, he improves their win rate by 3.0% to 50.3%. This shows that there is an important synergy between Karthus and Aurelion Sol that results in them performing better together than alone.
Aurelion Sol has a lower difficulty than Karthus. That means you don't need to be very careful when lining up Aurelion Sol comrades to go into battle on the same side as, as they will have to have a lower level of skill to fight well with you.
Working alongside, you should observe an overall large increase in your team’s capacity to to do a lot of AP damage. Together, these champions are able to dish out a surprising amount of magic type damage.
In contrast, by bringing Karthus and Aurelion Sol together, you may not be granting your side a great deal of attack damage. We recommend you include other champs on your team that helps cover this relative disparity in this pairing's capabilities.
Regardless of the ability of your Aurelion Sol teammate, you should focus on maximizing your income, staying alive by avoiding foolish fights, and taking down objectives. If you heed this simple advice, you should do well anyway.
To learn all of the intricacies of Karthus in order to synergize with Aurelion Sol during both the lane and mid / late game phases of League of Legends games, you should continue reading to learn additional tips and tricks for this champion pairing. If you mind the build and suggestions shown above, you will increase your win rate by a lot.
The most crucial finished items to use in your Karthus and Aurelion Sol synergy build include Rabadon's Deathcap, Malignance, and Shadowflame. When Karthus bought at least these three pieces in his build, he did a lot better as an ally of Aurelion Sol than with many other common item sets. In fact, Karthus boasted an average winrate of 50.3% when synergizing his build and playstyle to Aurelion Sol with these items in his kit.
To have the greatest likelihood of annihilating your oponents, you should equip the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Gathering Storm, and Transcendence runes from the Domination and Sorcery rune sets. Of all the rune sets players used for this champion pairing, this sequence of runes yielded the top win rate. Notably, these runes averaged a 50.3% win rate overall.
By default, tips, stats, and builds on how to synergize Aurelion Sol with Karthus are presented for all skill levels combined. If you would like to scope the stats and builds to a particular skill level, you should use the selection menu above.