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.
He gains speed while chasing in a straight line, but taking damage makes him lose that momentum.
Try to get inside his orbit, since his stars can't hurt you up close.
His stars disappear while stunned or silenced, giving you an easy opportunity to fight him.
His Starsurge ability can grow to cover a huge area - don't stay in the same place too long!
The stat comparisons shown on this page clarify several vital Karthus vs. Aurelion Sol matchup stats that can help us understand the differences between the two. For instance, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is better than Aurelion Sol’s KDA ratio of NaN, indicating that Karthus may be more central to his team's team fighting capability than Aurelion Sol..
Karthus often has a similar longest kill spree as his foe does. On average, he takes more damage than Aurelion Sol. This typically indicates differing health capacities, yet it can also illustrate that the champion with more health has less mobility and thus is unable to kite away from additional damage when engaged or poked.
Both League of Legends champs are great. Both champs have their pros and cons. In the game's current meta, Karthus usually loses when playing against Aurelion Sol, with a 48.5% win rate. Thus, Karthus makes a poor counter for Aurelion Sol.
While Karthus does have a lower winrate compared to Aurelion Sol, when on opposite teams, Karthus also has a greater level of difficulty that makes him a more time consuming champion to pick up and master. You should be careful when picking Karthus into Aurelion Solas his relative depth means that you may not be able to reach his full potential without a lot of practice beforehand.
Additionally, Karthus has some amount of utility and CC, a similar amount to Aurelion Sol. This often makes her just as valuable during teamfights, especially when trying to counter champions with a lot of burst damage.
While there is not a single best champion for every situation in League of Legends, in Karthus vs Aurelion Sol matchups, Aurelion Sol is the better champion with a lower win rate, similar champion depth, and a similar amount of utility to help out your teammates during team fights.
Karthus is a somewhat poor counter to Aurelion Sol. You will do well by focussing your play on keeping up your CS and taking out objectives. If you do that, you should be able to stand on your own as Karthus against Aurelion Sol.
If you would like to learn all of the intricacies of Karthus to counter Aurelion Sol during both the lane and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tips and tricks for this matchup. If you mind the build and tips shown here, you should increase your win rate significantly and be that much closer to League of Legends pro players.
Karthus often accumulates less CS as Aurelion Sol. Champions who typically don't get much CS usualy don't need much CS to be valuable teammates, such as support champions. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often need many items to be effective. In either situation, try to do better than the values shown on this page to do well.
The ideal items to prioritize in your Karthus versus Aurelion Sol build consist of Rabadon's Deathcap, Malignance, and Shadowflame. When Karthus used at least these three pieces in his build, he performed a lot better versus Aurelion Sol than with many other common counter builds. In fact, Karthus had an average winrate of 48.5% when playing against Aurelion Sol with this counter build.
To have the best probability of defeating Aurelion Sol as Karthus, you should use 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 sets players chose for Karthus vs Aurelion Sol matchups, this combination of runes yielded the best win rate. Notably, these runes averaged a 48.5% win rate overall.
By default, tips, statistics, and builds on how to beat Aurelion Sol as Karthus are given for all skill levels, merged. If you would like to narrow the stats and builds to a particular skill level, you may use the selection menu located earlier in the counter matchup guide.