Jax benefits greatly from items that have both Ability Power and Attack Damage such as Guinsoo's Rageblade and Hextech Gunblade.
Jax can Leap Strike to friendly units, including wards. You can use them to plan your escape.
Use the time after Sion has died to reposition and prepare for his return.
Even if Sion still hits a Decimating Smash, making him release the charge earlier reduces its impact.
The stats provided here underscore several important Jax vs. Sion counter statistics that can help us figure out the distinctions between the two. Jax’s KDA ratio ([kills + assists] / deaths) of NaN is better than Sion’s ratio of NaN, demonstrating that Jax may be more central to his team's team fighting capability than Sion..
Jax often has a slightly larger longest killing spree than his enemy does. On average, he takes less damage than Sion. This typically indicates differing health capacities, but it can also show that the one champion has less agility and thus is not able to flee from further damage when poked or engaged.
Both League champs are great champions. Both have their pros and cons. In the game's current meta, Jax usually loses when taking on Sion, with a 48.9% win rate. Therefore, Jax makes a poor counter to Sion.
While Jax does have a lower winrate than Sion, when facing one another, Jax also has a greater learning curve that makes him a more complex champ to learn. You still need to be cautious when picking Jax into Sion.
Additionally, Jax also has some amount of utility and CC, a similar amount to Sion. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there isn't one best champion in League of Legends, in Jax vs Sion matchups, Sion is the better champ with a lower win rate, similar champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Jax is a somewhat poor counter to Sion. You will do well by focussing your play on increasing your gold income and destroying objectives. If you do that, you should be able to stand on your own as Jax against Sion.
If you would like to learn all of the intricacies of Jax to counter Sion during both the lane and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tips and tricks for this matchup. If you listen to the build and suggestions displayed here, you will grow your win rate by a lot and be closer to League of Legends pro players.
Jax most often picks up less CS compared to Sion. Champs who on average don't take many minion kills often don't need much CS to be effective, such as sup champs. These kinds of champions are able to scale properly off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically have to have many items to be effective. In either case, try to surpass the numbers reported here to do well.
The most crucial items to use in your Jax versus Sion build include Blade of The Ruined King, Spear of Shojin, and Sundered Sky. When Jax incorporated at least these three items in his build, he performed significantly better when fighting Sion than with many other commonly used builds. In fact, Jax boasted an average win rate of 48.9% when countering Sion with this build.
To have the best chance of crushing Sion as Jax, you should equip the Lethal Tempo, Triumph, Legend: Alacrity, Coup de Grace, Sudden Impact, and Treasure Hunter runes from the Precision and Domination rune sets. Of all the rune builds players used for Jax vs Sion counter picks, this combo of runes yielded the greatest win rate. In fact, these runes averaged a 48.9% winrate overall.
By default, tips, statistics, and builds on how to beat Sion as Jax are given for all ranked divisions combined. If you would like to narrow the stats and builds to a particular division, you may use the selection menu at the top of this page.