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.
Melee allies can stack Frost for your Permafrost, keep an eye on who they are attacking.
Save Glacial Prison for encounters where you have teammates present to take advantage of it.
Use Arctic Assault to escape bad situations, interupt channeled spells or chase runners.
The Jax Sejuani synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Sejuani, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Jax sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Sejuani. His KDA fell from NaN to NaN. This decrease shows that Sejuani helps Jax perform worse in ranked LoL matches. Yet, the small difference demonstrates that this performance change is only marginal.
When Jax plays on the same team as Sejuani, he gets a noticable increase in his full damage output. This difference could signal that Sejuani supports by providing protection for him to dish out more damage or that her presence on the team also helps extend the game's duration. Similarly, when Jax is played together with Sejuani on the same team, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing alongside Sejuani.
Additionally, when Jax plays with Sejuani on the same side, he usually takes a little less damage than when he plays alone. Taking not as much damage could indicate that Sejuani does a decent job of protecting Jax during team fights.
There is no one best champion pairing for Jax that will no matter what be his ideal synergy. Yet, overall, Sejuani is a terrible teammate for Jax. By playing on the same side as Jax, she drops their win rate by -7.4% to 43.4%. This proves that there is a very bad synergy between Jax and Sejuani that results in them performing not as well together than alone.
Sejuani has a lower difficulty than Jax. That means Jax players don't need to be careful when arranging Sejuani allies to play with, as they will need a lower level of skill to play well with you.
When playing cooperatively, you should observe an overall large increase in your team’s capability to deal magical damage. When paired, these two can deal quite a lot of AP type damage.
Although, by grouping Jax and Sejuani together, you probably will not be giving your other allies enough utility. Make sure to pick other champions on your team that nullifies this relative hole in their kit.
Regardless of your Sejuani ally's ability, you need to focus on increasing your gold income, outlasting your enemies, and clearing objectives. If you heed this simple advice, you should do well anyway.
If you would like to truly master Jax in order to work well with Sejuani during both the laning and mid / late game phases of LoL games, you should keep reading to gather additional tips and tricks for this champion pairing. If you mind the build and stats displayed above, you should grow your win rate significantly.
The ideal items to focus on in your Jax and Sejuani synergy build include Sterak's Gage, Spear of Shojin, and Sundered Sky. When Jax included at least these three great items in his build, he performed significantly better when paired up with Sejuani than with many other typical item sets. In fact, Jax boasted an average win rate of 43.4% when playing alongside Sejuani with this build.
To have the best probability of coming out on top against your oponents, you should take the Grasp of the Undying, Demolish, Second Wind, Unflinching, Biscuit Delivery, and Cosmic Insight runes from the Resolve and Inspiration rune sets. Of all the runes players picked for this champion pairing, this combo of runes yielded the best win rate. Moreover, these runes averaged a 43.4% win rate overall.
By default, tips, stats, and builds on how to synergize Sejuani with Jax are displayed for every ranked division. To scope the statistics and builds to a specific division, you may use the selection menu earlier in the counter matchup guide.