Take advantage of Flurry by weaving in basic attacks between spell casts - this maximizes damage output and minimizes Energy loss.
Self-casting Safeguard and using Iron Will are powerful tools for killing neutral monsters (in the jungle).
Use Sonic Wave before Dragon's Rage so you can chase the target with Resonating Strike.
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 shown here underscore several vital Lee Sin against Rengar matchup stats that may help you figure out the distinctions between the pair. For instance, Lee Sin’s KDA ratio ([kills + assists] / deaths) of NaN is better than Rengar’s ratio of NaN, indicating that Lee Sin may be more central to his team's team fighting capability than Rengar..
Lee Sin often has a similar longest killing spree as his counter does. Commonly, he takes a similar amount of damage to Rengar. This is usually reflective of differing health capacities; however, it can also imply that the one champion has less mobility and thus is unable to escape further damage when poked or engaged.
Both League champs are great champions. Both have their pros and cons. In the game's current meta, Lee Sin usually fairs equally well when trying to fight Rengar, with a 49.6% win rate. As a result, Lee Sin makes an ok counter to Rengar.
While Lee Sin does have a lower winrate than Rengar, when facing one another, Lee Sin also has a lower learning curve that makes him a less complex character to pick up and master. You should be careful when picking Lee Sin into Rengar.
Furthermore, Lee Sin also has some amount of CC and other utility, a similar amount to Rengar. This often makes her just as valuable during teamfights, especially when trying to counter champions with a lot of burst damage.
While there isn't a single best champion in League of Legends, in Lee Sin vs Rengar matchups, Rengar is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your allied champions during late stage team fights.
Lee Sin is a somewhat poor counter for Rengar. Focus your tactics on maximizing your gold income and destroying objectives. If you can do that, you should be able to stand on your own as Lee Sin against Rengar.
To learn all of the intricacies of Lee Sin in order to counter Rengar during both the laning and mid / late game phases of League of Legends, you should continue reading to learn a few extra tricks and insights into this matchup. If you listen to the build and tips displayed here, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Lee Sin most often gets a similar amount of CS compared to Rengar. Champs who on average don't get much CS typically don't have to have much CS to be effective, such as support champions. These kinds of champions are capable of scaling well off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually need many items to be effective. In either case, try to do better than the numbers reported here to do well.
The most crucial items to focus on in your Lee Sin versus Rengar build consist of Sterak's Gage, Spear of Shojin, and Sundered Sky. When Lee Sin used at least these three pieces in his build, he performed significantly better versus Rengar than with most other commonly used counter builds. In fact, Lee Sin had an average winrate of 49.6% when playing against Rengar with these items in his kit.
To have the best likelihood of defeating Rengar as Lee Sin, you should equip the Conqueror, Triumph, Legend: Alacrity, Coup de Grace, Cosmic Insight, and Magical Footwear runes from the Precision and Inspiration rune sets. Out of all the rune sets players picked for Lee Sin vs Rengar counterpicks, this set of runes resulted in the best win rate. In fact, these runes averaged a 49.6% win rate overall.
If you would like to see Lee Sin x Rengar tips and matchup stats and build suggestions for a a particular rank, feel free to choose one from the selection menu provided above. By default, the stats and build suggestions shown are calculated using every game with data with both champs.