Make sure to buy items that will evolve at least 1 or 2 of your spells.
Work with your teammates to set up your Ultimate and optimize damage with your passive.
Try to catch enemy carries alone to burst them with Icathian Rain.
Gwen must hit something to recast her Ultimate, try to evade her between casts.
Gwen needs to attack a few times to set up her damage, so try to get the jump on her.
Gwen's Hallowed Mist shroud will only follow her once, after that it will dissipate when she leaves.
The stats shown here emphasize several strategic Kai'Sa vs. Gwen matchup statistics that can help us appreciate the differences and similarities between the two. For instance, Kai'Sa’s KDA ratio ([kills + assists] / deaths) of NaN is more than Gwen’s KDA ratio of NaN, demonstrating that Kai'Sa may be more central to her team's team fighting capability than Gwen..
Kai'Sa typically has a slightly larger longest killing spree than her counter does. Typically, she receives less damage than Gwen. This typically indicates different amounts of tankyness, but it can also imply that the champ with higher HP has less agility and thus is not able to kite away from further damage when poked or engaged.
Both LoL champions are great. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Kai'Sa usually fairs equally well when taking on Gwen, with a 49.2% win rate. Thus, Kai'Sa makes an ok counter to Gwen.
While Kai'Sa does have a lower winrate compared to Gwen, when they face off with one another, Kai'Sa also has a greater learning curve that makes her a more challenging champion to pick up and master. You still need to be cautious when picking Kai'Sa into Gwen.
Furthermore, Kai'Sa has only a small amount of utility and CC, a similar amount to Gwen. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Kai'Sa vs Gwen matchups, Gwen is the better champion with a similar win rate, more champion depth, and a similar amount of utility to help out your teammates during team fights.
Kai'Sa is a somewhat poor counter for Gwen. Make sure you focus your actions on increasing your gold and cs and taking out objectives. If you can do that, you should be able to stand on your own as Kai'Sa against Gwen.
To learn all of the intricacies of Kai'Sa to counter Gwen during both the laning and mid / late game phases of League of Legends, you should continue reading to learn a few extra tips and tricks for this matchup. If you mind the build and tips presented above, you should increase your win rate significantly and be closer to League of Legends pro players.
Kai'Sa often racks up a similar amount of CS relative to Gwen. Champs who on average don't get much CS typically don't need much CS to be valuable teammates, such as sup champs. They are able to scale properly off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually need a lot of items to be effective. In either case, try to surpass the numbers displayed here to do well.
The best items to use in your Kai'Sa versus Gwen build include Stormrazor, Nashor's Tooth, and Guinsoo's Rageblade. When Kai'Sa bought at least these three items in her build, she performed a lot better when facing Gwen than with many other common counter builds. In fact, Kai'Sa had an average winrate of 49.2% when countering Gwen with this counter build.
To have the highest chance of vanquishing Gwen as Kai'Sa, you should take the Hail of Blades, Taste of Blood, Eyeball Collection, Treasure Hunter, Biscuit Delivery, and Magical Footwear runes from the Domination and Inspiration rune sets. Of all the rune combinations players used for Kai'Sa vs Gwen face-offs, this combination of runes yielded the highest win rate. In fact, these runes gave a 49.2% win rate overall.
By default, tips, statistics, and builds on how to beat Gwen as Kai'Sa are shown for all ranked divisions combined. To scope the stats and builds to an individual division, you can use the selection menu located earlier in the counter matchup guide.