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.
Try to stay away from walls. Ornn is much less strong if he cannot stun you.
Attack Ornn to keep him from creating items in lane.
The stats provided here show some critical Aurelion Sol versus Ornn matchup statistics that can help you understand the distinctions between the two. Aurelion Sol’s KDA ratio ([kills + assists] / deaths) of NaN is more than Ornn’s KDA ratio of NaN, highlighting that Aurelion Sol may be more central to his team's team fighting effectiveness than Ornn. This observation is in large part a result of the difference in kills.
Aurelion Sol normally has a slightly larger longest killing spree than his counter does. On average, he takes less damage than Ornn. This often reflects different amounts of tankyness, but it can also show that the champion with increased health has less mobility and thus is unable to flee from further damage when engaged or poked.
Both LoL champions are great. Both have their pros and cons. In the game's current meta, Aurelion Sol usually wins when taking on Ornn, with a 51.3% win rate. Therefore, Aurelion Sol makes a good counter to Ornn.
While Aurelion Sol does have a higher win rate than Ornn, when facing 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 Ornnas his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Furthermore, Aurelion Sol also has almost no amount of utility and CC, a similar amount to Ornn. This makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there isn't one best champion overall in League of Legends, in Aurelion Sol vs Ornn matchups, Aurelion Sol is the better champion with a higher win rate, more champion depth, and a similar amount of utility to help out your allied champions during teamfights.
Aurelion Sol is a decent counter for Ornn. You will do well by focussing your gameplay on increasing your gold and cs and clearing objectives. If you can do that, you should do very well as Aurelion Sol against Ornn.
If you would like to truly master Aurelion Sol in order to counter Ornn during both the lane and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tricks and insights into this matchup. If you listen to the build and tips presented here, you will increase your win rate by a lot and be that much closer to League of Legends pro players.
Aurelion Sol most often picks up a similar amount of CS relative to Ornn. Champions who typically don't acquire much CS typically don't need much CS to be effective, such as supports. They are capable of scaling well off of their abilities and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically need many items to be effective. In either case, try to do better than the numbers shown on this page to do well.
The top items to focus on in your Aurelion Sol versus Ornn build include Rylai's Crystal Scepter, Malignance, and Liandry's Torment. When Aurelion Sol combined at least these three pieces in his build, he performed a lot better against Ornn than with many other typical builds. In fact, Aurelion Sol boasted an average win rate of 51.3% when countering Ornn with this build.
To have the greatest probability of crushing Ornn as Aurelion Sol, Aurelion Sol players should use the First Strike, Magical Footwear, Minion Dematerializer, Cosmic Insight, Absolute Focus, and Gathering Storm runes from the Inspiration and Sorcery rune sets. Out of all the rune combinations players chose for Aurelion Sol vs Ornn counter picks, this combo of runes yielded the best win rate. Moreover, these runes provided a 51.3% win rate overall.
By default, tips, stats, and builds on how to beat Ornn as Aurelion Sol are presented for all ranked divisions combined. To scope the statistics and builds to a distinct skill level, you should use the selection menu located above.