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.
Kai'Sa is very vulnerable to getting outranged by mages and long range carries.
Make sure to place wards in your blind spots so you can see Kai'Sa coming.
Kai'Sa is very good at picking off isolated enemies. Stick together against her.
The stat comparisons provided here show some influential Janna versus Kai'Sa counter stats that may help us appreciate the differences and similarities between the pair. Janna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Kai'Sa’s ratio of NaN, indicating that Janna may be more central to her team's team fighting effectiveness than Kai'Sa. This observation is largely fueled by the differences in assists.
Janna normally has a significantly smaller longest killing spree than her foe does. Typically, she takes a similar amount of damage to Kai'Sa. This is usually reflective of differing health capacities, but it can also show that the one champ has less mobility and thus is unable to flee from additional harm when engaged or poked.
Both LoL champs are great champions. Both have their strengths, weaknesses, and counters. In League's current meta, Janna usually wins when playing against Kai'Sa, with a 55.5% win rate. Therefore, Janna makes a fantastic counter to Kai'Sa.
While Janna does have a much higher win rate than Kai'Sa, when on opposite teams, Janna also has a greater difficulty level that makes her a more time consuming character to learn. You should be be fine when picking Janna into Kai'Saas her relative depth means that you may not be able to reach her full potential without a significant amount of practice beforehand.
Moreover, Janna has a great amount of utility and CC, a similar amount to Kai'Sa. 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 in League of Legends, in Janna vs Kai'Sa matchups, Janna is the better champion with a noticably higher win rate, more champion depth, and a similar amount of utility to help out your allied champions during team fights.
Janna is a great counter to Kai'Sa. You will do well by focussing your actions on keeping up your gold income and taking out objectives. If you do that, you should hold your own as Janna against Kai'Sa.
To learn all of the intricacies of Janna in order to counter Kai'Sa during both the lane and mid / late game phases of League of Legends, you should keep reading to pick up a few extra lessons on this matchup. If you mind the build and tips presented here, you should grow your win rate significantly and be that much closer to League of Legends pro players.
Janna on average accumulates a lot less CS compared to Kai'Sa. Champs who on average don't earn much CS typically don't need much CS to be effective, such as sup champs. They are able to scale properly off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, typically need several high cost items to be effective. In either situation, try to exceed the values displayed here to do well.
The ideal items to focus on in your Janna versus Kai'Sa build consist of Dream Maker, Imperial Mandate, and Moonstone Renewer. When Janna combined at least these three pieces in her build, she performed much better countering Kai'Sa than with many other commonly used item sets. In fact, Janna had an average win rate of 55.5% battling Kai'Sa with this counter build.
To have the best probability of crushing Kai'Sa as Janna, Janna players should use the Summon Aery, Manaflow Band, Celerity, Gathering Storm, Eyeball Collection, and Relentless Hunter runes from the Sorcery and Domination rune sets. Of all the rune combinations players chose for Janna vs Kai'Sa matchups, this mix of runes yielded the best win rate. Moreover, these runes averaged a 55.5% winrate overall.
By default, tips, statistics, and builds on how to beat Kai'Sa as Janna are given for all skill levels, merged. If you would like to scope the stats and builds to a specific player tier, you may use the selection menu located earlier in the counter matchup guide.