Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
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 underscore some critical Karthus vs. Rengar counter statistics that can help us grasp the differences and similarities between the two. As an example, Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is more than Rengar’s ratio of NaN, indicating that Karthus may be more central to his team's team fighting capacity than Rengar..
Karthus normally has a slightly smaller longest kill spree than his counter does. Commonly, he takes less damage than Rengar. This commonly reflects differing health capacities, but it can also hint that the one champion has less agility and thus is not able to flee from further damage when engaged or poked.
Both LoL champions are great champions. Both have their pros and cons. In League's current meta, Karthus usually loses when taking on Rengar, with a 47.5% win rate. As a result, Karthus makes a bad counter for Rengar.
While Karthus does have a lower winrate compared to Rengar, when facing one another, Karthus also has a lower difficulty level that makes him a less difficult champ to develop with. You should be very concerned when picking Karthus into Rengaras his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Moreover, Karthus also has some amount of utility and CC, a similar amount to Rengar. This often makes her just as valuable during team fights, especially when fighting champions with a lot of burst damage.
While there isn't one best champion in League of Legends, in Karthus vs Rengar matchups, Rengar is the better champ with a lower win rate, less champion complexity, and a similar amount of utility to help out your allied champions during teamfights.
Karthus is a bad counter to Rengar. Make sure you focus your actions on maximizing your gold and cs and destroying objectives. If you can do that, you should hold your own as Karthus against Rengar.
To learn all of the intricacies of Karthus to counter Rengar during both the lane and mid / late game phases of League of Legends, you should continue reading to learn a few extra lessons on this matchup. If you pay attention to the build and tips presented here, you should grow your win rate by a lot and be closer to League of Legends pro players.
Karthus often accumulates more CS relative to Rengar. Champions 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 well off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often require many items to be effective. In either case, try to exceed the numbers reported here to do well.
The ideal items to focus on in your Karthus versus Rengar build consist of Rabadon's Deathcap, Malignance, and Stormsurge. When Karthus combined at least these three pieces in his build, he performed much better against Rengar than with most other common counter builds. In fact, Karthus had an average win rate of 47.5% when countering Rengar with this build.
To have the best probability of beating Rengar as Karthus, Karthus players should take the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Presence of Mind, and Last Stand runes from the Domination and Precision rune sets. Of all the runes players picked for Karthus vs Rengar counters, this composite of runes resulted in the greatest win rate. In fact, these runes provided a 47.5% winrate overall.
If you want to see Karthus versus Rengar tips and counter stats for a a specific division rank, please choose one from the selection menu provided above. At first, the stats and guides given are calculated using every match with data with both champions.