Timing Janna's ultimate can push enemies away from a wounded ally or even separate enemies.
Eye of the Storm can be used on allied turrets.
Quickly firing a Howling Gale without the charge up can be used to heavily disable the other team.
It takes 6 spell casts for Kassadin's slow, Force Pulse, to become castable. If he levels up that ability, judiciously use your own skills while laning against him.
Kassadin deals mostly magic damage. If he's doing well consider buying magic resist items like Mercury's Treads and Banshee's Veil.
Each time Kassadin consecutively uses Riftwalk, he pays more and more mana. Keep this in mind as you chase him.
The stats shown here show some influential Janna vs. Kassadin matchup stats that can help us grasp the distinctions between the two. As an example, Janna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kassadin’s KDA ratio of NaN, indicating that Janna may be more central to her team's team fighting potential than Kassadin. This observation is largely caused by the differences in assists.
Janna normally has a significantly smaller longest killing spree than her opponent does. Commonly, she receives less damage than Kassadin. This often reflects different amounts of tankyness, but it can also illustrate that the champion with increased health has less mobility and thus is not able to flee from further harm when poked or engaged.
Both LoL champs are great champions. Both champs have their pros and cons. In League's current meta, Janna usually fairs equally well when trying to fight Kassadin, with a 50.8% win rate. Thus, Janna makes an ok counter to Kassadin.
While Janna does have a higher win rate than Kassadin, when facing one another, Janna also has a lower level of difficulty that makes her a less challenging champion to learn. You still need to be cautious when picking Janna into Kassadinas her relative depth means that you may not be able to reach her full potential without a significant amount of practice beforehand.
Furthermore, Janna has a very large amount of utility and CC, a similar amount to Kassadin. This often makes her just as valuable during team fights, especially when trying to counter champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Janna vs Kassadin matchups, Janna 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.
Janna is a decent counter for Kassadin. You will do well by focussing your actions on keeping up your gold and cs and clearing objectives. If you do that, you should hold your own as Janna against Kassadin.
To truly master Janna in order to counter Kassadin during both the early game and mid / late game phases of League of Legends, you should continue reading to pick up a few extra tricks and insights into this matchup. If you mind the build and stats displayed above, you will increase your win rate significantly and be that much closer to League of Legends pro players.
Janna usually racks up a lot less CS relative to Kassadin. Champions who on average don't earn much CS typically don't need much CS to be effective, such as support champions. These kinds of champions are able to scale properly off of their abilities and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually require several high cost items to be effective. In either situation, try to do better than the numbers reported here to do well.
The top items to prioritize in your Janna versus Kassadin build consist of Redemption, Ardent Censer, and Moonstone Renewer. When Janna combined at least these three pieces in her build, she did a lot better vs. Kassadin than with many other commonly used counter builds. In fact, Janna boasted an average winrate of 50.8% when countering Kassadin with this build.
To have the greatest chance of beating Kassadin as Janna, Janna players should use the Summon Aery, Manaflow Band, Celerity, Scorch, Eyeball Collection, and Relentless Hunter runes from the Sorcery and Domination rune sets. Out of all the runes players picked for Janna vs Kassadin counterpicks, this combo of runes yielded the greatest win rate. In fact, these runes gave a 50.8% winrate overall.
By default, tips, stats, and builds on how to beat Kassadin as Janna are given for all ranked divisions combined. If you want to scope the statistics and builds to a distinct skill level, you can use the selection menu located earlier on the page.