Keeping tunnels spread out across the map will ensure you have choices when you want to cast Void Rush.
Cast Burrow before travelling around the map to take advantage of the increased Move Speed and the safety provided by Tremor Sense.
Tremor Sense can warn you of enemies closing in, and is particularly useful when entering enemy territory.
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 shown on this page feature some influential Rek'Sai vs. Kai'Sa counter statistics that may help you distinguish the differences and similarities between the pair. As an example, Rek'Sai’s KDA ratio ([kills + assists] / deaths) of NaN is more than Kai'Sa’s ratio of NaN, demonstrating that Rek'Sai may be more central to his team's team fighting capability than Kai'Sa..
Rek'Sai often has a similar longest killing spree as his counter does. On average, he takes more damage than Kai'Sa. This is usually reflective of differing health capacities, yet it can also indicate that the champ with more health has less agility and thus is not able to kite away from further damage when poked or engaged.
Both League champs are great champions. Both have their pros and cons. In League's current meta, Rek'Sai usually wins when playing against Kai'Sa, with a 51.2% win rate. Thus, Rek'Sai makes a good counter for Kai'Sa.
While Rek'Sai does have a higher winrate than Kai'Sa, when facing one another, Rek'Sai also has a lower level of difficulty that makes him a less difficult champion to learn. You should be careful when picking Rek'Sai into Kai'Sa.
Moreover, Rek'Sai has some amount 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 lot of burst damage.
While there is not a single best champion in League of Legends, in Rek'Sai vs Kai'Sa matchups, Rek'Sai is the better champion with a higher win rate, less champion complexity, and a similar amount of utility to help out your allies during teamfights.
Rek'Sai is a decent counter to Kai'Sa. You will do well by focussing your play on keeping up your gold income and destroying objectives. If you are able to do that, you should do very well as Rek'Sai against Kai'Sa.
To truly master Rek'Sai to counter Kai'Sa during both the lane and mid / late game phases of League of Legends, you should continue reading to gather a few extra tricks and insights into this matchup. If you mind the build and stats shown here, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Rek'Sai often accumulates a lot less CS as Kai'Sa. Champions who on average don't acquire much CS often don't need much CS to be valuable teammates, such as supports. These kinds of champions 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, often need many items to be effective. In either case, try to exceed the numbers displayed here to do well.
The best items to have in your Rek'Sai versus Kai'Sa build include Black Cleaver, Youmuu's Ghostblade, and Titanic Hydra. When Rek'Sai incorporated at least these three pieces in his build, he did a lot better countering Kai'Sa than with many other typical item sets. In fact, Rek'Sai boasted an average win rate of 51.2% when playing against Kai'Sa with this counter build.
To have the best probability of coming out on top against Kai'Sa as Rek'Sai, Rek'Sai players should equip the Conqueror, Triumph, Legend: Alacrity, Coup de Grace, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Out of all the rune builds players used for Rek'Sai vs Kai'Sa counter picks, this mixture of runes yielded the highest win rate. Notably, these runes gave a 51.2% winrate overall.
If you want to view Rek'Sai versus Kai'Sa tips and counter builds for a a specific player tier, please choose one from the selection menu shown above. At first, the statistics and strategies shown are computed using all rounds finished with these champs.