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.
Kennen is flimsy by nature - turn and attack him if he gets careless with Lightning Rush.
Consider playing a bit more cautiously around Kennen when you have a Mark of the Storm debuff. If he hits you with 3 Marks of the Storm, you will get stunned.
The stats shown here show several valuable Karthus versus Kennen counter statistics that can help us realize the differences and similarities between this pair of champions. Karthus’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kennen’s KDA ratio of NaN, indicating that Karthus may be more central to his team's team fighting potential than Kennen..
Karthus typically has a slightly larger longest kill spree than his foe does. Commonly, he takes a similar amount of damage to Kennen. This often reflects differing health capacities; however, it can also imply that the one champion has less agility and thus is unable to flee from further harm when engaged or poked.
Both League champs are great. Both have their strengths, weaknesses, and counters. In the game's current meta, Karthus usually wins when trying to fight Kennen, with a 53.1% win rate. Therefore, Karthus makes a great counter to Kennen.
While Karthus does have a higher win rate compared to Kennen, when they face off with one another, Karthus also has a much greater learning curve that makes him a more complex character to learn and master. You should be be fine when picking Karthus into Kennenas his relative depth means you may not be able to unleash his full potential without a significant amount of practice beforehand.
Furthermore, Karthus also has some amount of utility and CC, a similar amount to Kennen. This makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there isn't a single best champion overall in League of Legends, in Karthus vs Kennen matchups, Karthus is the better champ with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your team members during late stage team fights.
Karthus is a great counter to Kennen. Focus your gameplay on maximizing your gold and cs and destroying objectives. If you can do that, you should do very well as Karthus against Kennen.
If you would like to learn all of the intricacies of Karthus in order to counter Kennen during both the lane and mid / late game phases of League of Legends, you should keep reading to learn a few extra tips and tricks for this matchup. If you listen to the build and tips presented above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Karthus usually accumulates a similar amount of CS as Kennen. Champions who typically don't earn many minion kills usualy don't require much CS to be valuable teammates, such as supports. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, often require several high cost items to be effective. In either case, try to do better than the numbers shown here to do well.
The best items to focus on in your Karthus versus Kennen build include Liandry's Anguish, Rabadon's Deathcap, and Shadowflame. When Karthus combined at least these three pieces in his build, he performed a lot better against Kennen than with many other typical counter builds. In fact, Karthus had an average win rate of 53.1% battling Kennen with these items in his kit.
To have the best chance of annihilating Kennen as Karthus, you should use the Dark Harvest, Taste of Blood, Eyeball Collection, Treasure Hunter, Presence of Mind, and Last Stand runes from the Domination and Precision rune sets. Of all the runes we have analyed for Karthus vs Kennen counters, this order of runes yielded the best win rate. Moreover, these runes averaged a 53.1% winrate overall.
If you would like to see Karthus x Kennen tips and counter builds for a a distinct division, feel free to select one from the selection menu displayed above. If viewing for the first time, the stats and strategies given are computed using all games with data with both champs.