For increased range and damage, try casting Shock Blast through the Acceleration Gate.
If you find yourself taking lots of damage, try using Jayce's Hammer Stance, as it grants you additional defenses.
Be sure to switch stances often. It will enhance your attacks and grant you quick bursts of speed.
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.
Kennen is flimsy by nature - turn and attack him if he gets careless with Lightning Rush.
The stat comparisons shown here underscore some critical Jayce against Kennen matchup stats that may help you grasp the differences between the two. Jayce’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kennen’s KDA ratio of NaN, indicating that Jayce may be more central to his team's team fighting capability than Kennen..
Jayce often has a similar longest killing spree as his foe does. On average, he receives a similar amount of damage to Kennen. This often reflects differing health capacities, yet it can also show that the one champ has less mobility and thus is not able to kite away from additional damage when engaged or poked.
Both League of Legends champions are great champions. Both have their strengths, weaknesses, and counters. In League's current meta, Jayce usually loses when trying to fight Kennen, with a 48.3% win rate. Thus, Jayce makes a poor counter to Kennen.
While Jayce does have a lower winrate compared to Kennen, when they face off with one another, Jayce also has a much greater level of difficulty that makes him a more difficult character to develop with. You should be careful when picking Jayce into Kennenas his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Furthermore, Jayce also has almost no amount of CC and other utility, a similar amount to Kennen. This makes her just as valuable during teamfights, especially when trying to counter champions with a ton of burst damage.
While there is not a single best champion overall in League of Legends, in Jayce vs Kennen matchups, Kennen is the better champ with a lower win rate, more champion depth, and a similar amount of utility to help out your team members during team fights.
Jayce is a somewhat poor counter to Kennen. Focus your gameplay on keeping up your CS and clearing objectives. If you are able to do that, you should hold your own as Jayce against Kennen.
If you would like to truly master Jayce in order to counter Kennen during both the early game and mid / late game phases of League of Legends, you should keep reading to gather a few extra tricks and insights into this matchup. If you listen to the build and suggestions displayed here, you will grow your win rate by a lot and be closer to League of Legends pro players.
Jayce usually racks up a similar amount of CS as Kennen. Champions who typically don't take many minion kills often don't require much CS to be effective, such as supports. These kinds of champions are able to scale well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, typically have to have a lot of items to be effective. In either situation, try to exceed the numbers displayed here to do well.
The top items to focus on in your Jayce versus Kennen build include Muramana, Youmuu's Ghostblade, and Edge of Night. When Jayce used at least these three items in his build, he did a lot better against Kennen than with most other common counter builds. In fact, Jayce had an average winrate of 48.3% battling Kennen with these items in his kit.
To have the highest likelihood of vanquishing Kennen as Jayce, you should take the First Strike, Magical Footwear, Biscuit Delivery, Cosmic Insight, Manaflow Band, and Transcendence runes from the Inspiration and Sorcery rune sets. Of all the runes players used for Jayce vs Kennen matchups, this composite of runes resulted in the best win rate. In fact, these runes gave a 48.3% win rate overall.
By default, tips, stats, and builds on how to beat Kennen as Jayce are given for all ranked divisions. If you want to scope the stats and builds to an individual player tier, you may use the selection menu earlier in the counter matchup guide.