Nami's ultimate can come in very handy for initiating on enemies who are far away.
Using Ebb and Flow during an engagement with enemy champions will help sway the battle in your favor.
Aqua Prison has a long cooldown, make sure to use it at the right moment.
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 stats shown on this page feature several critical Nami against Kai'Sa matchup statistics that can help you realize the differences between the two. Nami’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Kai'Sa’s KDA ratio of NaN, demonstrating that Nami may be more central to her team's team fighting potential than Kai'Sa. This observation is largely caused by the differences in assists.
Nami normally has a significantly smaller longest killing spree than her matchup does. Typically, she receives less damage than Kai'Sa. This commonly reflects differing health capacities, but it can also show that the champion with increased HP has less agility and thus is unable to kite away from further damage when engaged or poked.
Both League champs are great champions. Both have their strengths, weaknesses, and counters. In the game's current meta, Nami usually wins when trying to fight Kai'Sa, with a 52.7% win rate. Therefore, Nami makes a good counter for Kai'Sa.
While Nami does have a higher winrate than Kai'Sa, when they face off with one another, Nami also has a lower level of difficulty that makes her a less challenging champion to develop with. You don't need to be too worried when picking Nami into Kai'Sa.
Additionally, Nami has a great deal of CC and other utility, a similar amount to Kai'Sa. This often makes her just as valuable during team fights, especially when trying to counter champions with a ton of burst damage.
While there isn't a single best champion in League of Legends, in Nami vs Kai'Sa matchups, Nami is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your teammates during late stage team fights.
Nami is an above average counter for Kai'Sa. You will do well by focussing your tactics on maximizing your CS and destroying objectives. If you are able to do that, you should do very well as Nami against Kai'Sa.
If you would like to learn all of the intricacies of Nami to counter Kai'Sa during both the early game and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tips and tricks for this matchup. If you mind the build and stats presented above, you will grow your win rate significantly and be closer to League of Legends pro players.
Nami typically picks up a lot less CS as Kai'Sa. Champs who on average don't get many minion kills usualy don't require much CS to be effective, such as support champions. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually need a lot of items to be effective. In either case, try to exceed the values shown here to do well.
The top items to focus on in your Nami versus Kai'Sa build include Ardent Censer, Zaz'Zak's Realmspike, and Staff of Flowing Water. When Nami used at least these three items in her build, she did much better vs. Kai'Sa than with most other common builds. In fact, Nami boasted an average winrate of 52.7% when countering Kai'Sa with this counter build.
To have the greatest probability of defeating Kai'Sa as Nami, you should use the Summon Aery, Manaflow Band, Transcendence, Scorch, Biscuit Delivery, and Cosmic Insight runes from the Sorcery and Inspiration rune sets. Out of all the runes players chose for Nami vs Kai'Sa battles, this composite of runes yielded the greatest win rate. Moreover, these runes provided a 52.7% win rate overall.
If you would like to see Nami x Kai'Sa tips and matchup stats and build suggestions for a a distinct rank, feel free to choose one from the selection menu provided above. If viewing for the first time, the stats and strategies shown are computed using all matches played with both champions.