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.
Dodging Arctic Assault and Glacial Prison can give you a huge advantage.
Focus on avoiding the second swing of Winter's Wrath which carries the brunt of the damage.
Melee enemies can also stack Frost for Sejuani, be very careful around them.
The stat comparisons shown here highlight some valuable Jax versus Sejuani counter statistics that may help you understand the differences between the pair. As an example, Jax’s KDA ratio ([kills + assists] / deaths) of NaN is better than Sejuani’s KDA ratio of NaN, highlighting that Jax may be more central to his team's team fighting potential than Sejuani..
Jax normally has a slightly larger longest killing spree than his matchup does. Commonly, he takes less damage than Sejuani. This often reflects different amounts of tankyness; however, it can also illustrate that the champion with increased health has less agility and thus is not able to escape additional damage when poked or engaged.
Both LoL champs are great. Both champs have their pros and cons. In the game's current meta, Jax usually wins when facing off against Sejuani, with a 55.3% win rate. Therefore, Jax makes a fantastic counter for Sejuani.
While Jax does have a much higher winrate compared to Sejuani, when on opposite teams, Jax also has a greater level of difficulty that makes him a more complex champ to develop with. You don't need to be too worried when picking Jax into Sejuani.
Furthermore, Jax has some amount of CC and other utility, a similar amount to Sejuani. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there is not a single best champion in League of Legends, in Jax vs Sejuani matchups, Jax is the better champ with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Jax is a great counter to Sejuani. Focus your play on maximizing your gold income and destroying objectives. If you do that, you should hold your own as Jax against Sejuani.
To truly master Jax in order to counter Sejuani during both the lane and mid / late game phases of League of Legends, you should keep reading to learn a few extra tips and tricks for this matchup. If you listen to the build and stats presented above, you will increase your win rate by a lot and be that much closer to League of Legends pro players.
Jax often gets more CS relative to Sejuani. Champs who on average don't get many minion kills usualy don't require much CS to be effective, such as sup champs. They are able to scale properly off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, usually require many items to be effective. In either case, try to exceed the values displayed here to do well.
The most crucial items to prioritize in your Jax versus Sejuani build include Trinity Force, Titanic Hydra, and Sundered Sky. When Jax combined at least these three items in his build, he did a lot better versus Sejuani than with many other typical builds. In fact, Jax had an average win rate of 55.3% when playing against Sejuani with these items in his kit.
To have the highest probability of coming out on top against Sejuani as Jax, Jax players should equip the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Cosmic Insight, and Magical Footwear runes from the Precision and Inspiration rune sets. Out of all the rune builds that we analyzed for Jax vs Sejuani matchups, this set of runes yielded the best win rate. In fact, these runes gave a 55.3% win rate overall.
By default, tips, statistics, and builds on how to beat Sejuani as Jax are displayed for all ranked divisions combined. To narrow the statistics and builds to an individual division, you can use the selection menu earlier in the counter matchup guide.