Use Demacian Standard as a scouting tool when worried about incoming enemies.
You can use the Dragon Strike / Demacian Standard combo to get out of your own Cataclysm arenas.
Split your basic attacks on different champions at the beginning of fights to maximize damage.
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 stat comparisons provided here clarify some strategic Jarvan IV against Rengar counter stats that can help you understand the differences and similarities between the pair. As an example, Jarvan IV’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Rengar’s KDA ratio of NaN, highlighting that Jarvan IV may be more central to his team's team fighting potential than Rengar. This observation is largely a result of the differences in assists.
Jarvan IV usually has a slightly smaller longest killing spree than his matchup does. Commonly, he receives less damage than Rengar. This typically indicates different amounts of tankyness, yet it can also illustrate that the one champ has less agility and thus is not able to kite away from further harm when poked or engaged.
Both LoL champs are great. Both have their pros and cons. In League's current meta, Jarvan IV usually wins when trying to fight Rengar, with a 54.3% win rate. Therefore, Jarvan IV makes a great counter to Rengar.
While Jarvan IV does have a much higher win rate than Rengar, when facing one another, Jarvan IV also has a lower difficulty level that makes him a less challenging champ to learn. You should be be fine when picking Jarvan IV into Rengar.
Moreover, Jarvan IV also has some amount of utility and CC, a similar amount to Rengar. This makes her just as valuable during teamfights, especially when trying to counter champions with a lot of burst damage.
While there isn't one best champion in League of Legends, in Jarvan IV vs Rengar matchups, Jarvan IV is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your allied champions during teamfights.
Jarvan IV is a great counter for Rengar. You will do well by focussing your tactics on maximizing your gold and cs and clearing objectives. If you do that, you should be able to stand on your own as Jarvan IV against Rengar.
If you would like to truly master Jarvan IV in order to counter Rengar during both the laning and mid / late game phases of League of Legends, you should continue reading to gather a few extra tips and tricks for this matchup. If you pay attention to the build and tips displayed above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Jarvan IV on average accumulates a similar amount of CS relative to Rengar. Champions who on average don't earn many minion kills usualy don't have to have much CS to be effective, such as supports. These kinds of champions are able to scale properly off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, typically need a lot of items to be effective. In either situation, try to do better than the numbers displayed here to do well.
The best items to prioritize in your Jarvan IV versus Rengar build include Goredrinker, Black Cleaver, and Death's Dance. When Jarvan IV bought at least these three items in his build, he did much better when fighting Rengar than with many other typical counter builds. In fact, Jarvan IV had an average winrate of 54.3% when playing against Rengar with this counter build.
To have the greatest chance of coming out on top against Rengar as Jarvan IV, you should equip the Conqueror, Triumph, Legend: Alacrity, Coup de Grace, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Out of all the rune sets that we analyzed for Jarvan IV vs Rengar clashes, this combination of runes yielded the highest win rate. Moreover, these runes averaged a 54.3% winrate overall.
If you need to view Jarvan IV x Rengar tips and builds for a an individual skill level, feel free to select one from the selection menu provided above. If viewing for the first time, the stats and strategies given are computed using all rounds with data with both champions.