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.
Rengar's passive enables him to leap out of brush, so avoid fighting him when near bushes.
Rengar puts an indicator over the nearest enemy champion when he is camouflaged during his ultimate.
Rengar gains an empowered ability when his resource bar is full. Try to confront him when it's low.
The stats shown here show some important Jax against Rengar matchup stats that may help us explain the differences between the pair. As an example, Jax’s KDA ratio ([kills + assists] / deaths) of NaN is better than Rengar’s ratio of NaN, demonstrating that Jax may be more central to his team's team fighting effectiveness than Rengar..
Jax typically has a similar longest killing spree as his foe does. Commonly, he receives less damage than Rengar. This commonly reflects different amounts of tankyness; however, it can also indicate that the one champion has less mobility and thus is not able to escape additional harm when engaged or poked.
Both LoL champions are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Jax usually wins when taking on Rengar, with a 52.1% win rate. Thus, Jax makes a good counter to Rengar.
While Jax does have a higher win rate compared to Rengar, when on opposite teams, Jax also has a lower difficulty level that makes him a less complex champ to learn. You should be be fine when picking Jax into Rengar.
Additionally, Jax also has some amount of CC and other utility, a similar amount to Rengar. This often makes her just as valuable during team fights, especially when trying to counter champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Jax vs Rengar matchups, Jax is the better champion with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your teammates during teamfights.
Jax is a good counter for Rengar. You will do well by focussing your gameplay on increasing your CS and clearing objectives. If you do that, you should hold your own as Jax against Rengar.
If you would like to learn all of the intricacies of Jax in order to counter Rengar during both the laning and mid / late game phases of League of Legends, you should keep reading to pick up a few extra lessons on this matchup. If you mind the build and suggestions presented above, you will increase your win rate significantly and be that much closer to League of Legends pro players.
Jax often racks up more CS relative to Rengar. Champions who typically don't earn much CS usualy don't have to have much CS to be effective, such as sup champs. These kinds of champions are capable of scaling properly off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, often have to have a lot of items to be effective. In either situation, try to do better than the values displayed on this page to do well.
The ideal items to have in your Jax versus Rengar build include Guardian Angel, Trinity Force, and Death's Dance. When Jax incorporated at least these three pieces in his build, he did much better versus Rengar than with many other typical counter builds. In fact, Jax had an average winrate of 52.1% when countering Rengar with this counter build.
To have the best probability of defeating Rengar as Jax, Jax players should take the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Of all the rune sets players used for Jax vs Rengar fights, this mixture of runes resulted in the best win rate. Notably, these runes provided a 52.1% winrate overall.
By default, tips, statistics, and builds on how to beat Rengar as Jax are displayed for all ranked divisions combined. If you would like to narrow the statistics and builds to an individual rank, you can use the selection menu earlier in the counter matchup guide.