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.
Karthus can cast spells for a short duration after he is killed. Move away from his corpse to be safe.
Make sure you always have enough health to survive Requiem, even if you have to go back to the base more frequently to heal.
The stats shown on this page clarify several strategic Aurelion Sol against Karthus counter statistics that may help us grasp the differences between the two. For instance, Aurelion Sol’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Karthus’s KDA ratio of NaN, demonstrating that Aurelion Sol may be more central to his team's team fighting potential than Karthus..
Aurelion Sol typically has a similar longest kill spree as his opponent does. Commonly, he takes less damage than Karthus. This is usually reflective of differing health capacities, but it can also imply that the champ with higher health has less mobility and thus is unable to flee from additional harm when engaged or poked.
Both LoL champions are great. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Aurelion Sol usually wins when trying to fight Karthus, with a 51.5% win rate. Therefore, Aurelion Sol makes a good counter for Karthus.
While Aurelion Sol does have a higher win rate compared to Karthus, when they face off with one another, Aurelion Sol also has a greater level of difficulty that makes him a more challenging champ to pick up and master. You still need to be cautious when picking Aurelion Sol into Karthusas his relative depth means you may not be able to reach his full potential without a lot of practice beforehand.
Furthermore, Aurelion Sol has almost no amount of CC and other utility, a similar amount to Karthus. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there isn't one best champion in League of Legends, in Aurelion Sol vs Karthus matchups, Aurelion Sol is the better champ with a higher win rate, similar champion depth, and a similar amount of utility to help out your team members during team fights.
Aurelion Sol is a decent counter to Karthus. Make sure you focus your actions on maximizing your CS and clearing objectives. If you do that, you should be able to stand on your own as Aurelion Sol against Karthus.
If you would like to learn all of the intricacies of Aurelion Sol in order to counter Karthus during both the early game and mid / late game phases of League of Legends, you should keep reading to gather a few extra lessons on this matchup. If you mind the build and tips displayed here, you should grow your win rate by a lot and be closer to League of Legends pro players.
Aurelion Sol on average accumulates more CS as Karthus. Champions who on average don't get much CS usualy don't need much CS to be effective, such as support champions. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually need many items to be effective. In either situation, try to surpass the values reported on this page to do well.
The top items to prioritize in your Aurelion Sol versus Karthus build include Rylai's Crystal Scepter, Zhonya's Hourglass, and Liandry's Torment. When Aurelion Sol used at least these three items in his build, he did much better countering Karthus than with most other commonly used item sets. In fact, Aurelion Sol boasted an average win rate of 51.5% when playing against Karthus with this build.
To have the greatest probability of annihilating Karthus as Aurelion Sol, you should use the Arcane Comet, Manaflow Band, Transcendence, Gathering Storm, Magical Footwear, and Minion Dematerializer runes from the Sorcery and Inspiration rune sets. Of all the runes players chose for Aurelion Sol vs Karthus counter picks, this combination of runes yielded the best win rate. Moreover, these runes gave a 51.5% win rate overall.
By default, tips, stats, and builds on how to beat Karthus as Aurelion Sol are displayed for all ranked divisions combined. If you want to scope the stats and builds to a distinct skill level, you should use the selection menu at the top of this page.