Lead your enemy when targeting with Noxious Blast to ensure the hit.
Use Twin Fang on poisoned stationary targets like monsters and units stunned by her Petrifying Gaze for maximum damage.
When Rek'Sai is near, she can see the position of you and your allies, but only if you're moving.
If you see one of Rek'Sai's tunnels, briefly stand on one of the entrances to destroy it.
Rek'Sai's Furious Bite gains damage as she builds Fury. Be very careful around her when her Fury is full.
The stats shown here clarify some strategic Cassiopeia versus Rek'Sai matchup stats that may help us realize the distinctions between the pair. For instance, Cassiopeia’s KDA ratio ([kills + assists] / deaths) of NaN is more than Rek'Sai’s KDA ratio of NaN, showing that Cassiopeia may be more central to her team's team fighting capability than Rek'Sai..
Cassiopeia normally has a similar longest killing spree as her matchup does. Typically, she takes less damage than Rek'Sai. This is usually reflective of different amounts of tankyness; however, it can also indicate that the one champ has less mobility and thus is not able to escape further damage when engaged or poked.
Both LoL champions are great champions. Both champs have their strengths, weaknesses, and counters. In League's current meta, Cassiopeia usually fairs equally well when trying to fight Rek'Sai, with a 49.5% win rate. Therefore, Cassiopeia makes an ok counter to Rek'Sai.
While Cassiopeia does have a lower winrate compared to Rek'Sai, when on opposite teams, Cassiopeia also has a much greater level of difficulty that makes her a more difficult character to develop with. You should be careful when picking Cassiopeia into Rek'Saias her relative depth means that you may not be able to unleash her full potential without a lot of practice beforehand.
Furthermore, Cassiopeia has a good amount of utility and CC, a similar amount to Rek'Sai. This often makes her just as valuable during teamfights, especially when fighting champions with a lot of burst damage.
While there isn't one best champion overall in League of Legends, in Cassiopeia vs Rek'Sai matchups, Rek'Sai is the better champ with a similar win rate, more champion depth, and a similar amount of utility to help out your allies during late stage team fights.
Cassiopeia is a somewhat poor counter for Rek'Sai. You will do well by focussing your gameplay on increasing your CS and taking out objectives. If you are able to do that, you should do very well as Cassiopeia against Rek'Sai.
If you would like to truly master Cassiopeia in order to counter Rek'Sai during both the laning and mid / late game phases of League of Legends, you should continue reading to pick up a few extra lessons on this matchup. If you pay attention to the build and stats displayed here, you will increase your win rate by a lot and be closer to League of Legends pro players.
Cassiopeia on average racks up much more CS compared to Rek'Sai. Champions who typically don't earn many minion kills usualy don't need much CS to be effective, such as support champions. They are capable of scaling well off of their abilities and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually have to have a lot of items to be effective. In either case, try to exceed the values displayed on this page to do well.
The most important items to focus on in your Cassiopeia versus Rek'Sai build consist of Seraph's Embrace, Rylai's Crystal Scepter, and Rod of Ages. When Cassiopeia bought at least these three items in her build, she performed much better against Rek'Sai than with most other typical item sets. In fact, Cassiopeia had an average winrate of 49.5% battling Rek'Sai with this counter build.
To have the best chance of beating Rek'Sai as Cassiopeia, you should equip the Conqueror, Presence of Mind, Legend: Tenacity, Last Stand, Manaflow Band, and Transcendence runes from the Precision and Sorcery rune sets. Of all the runes that we analyzed for Cassiopeia vs Rek'Sai matchups, this combination of runes resulted in the highest win rate. Moreover, these runes provided a 49.5% win rate overall.
If you need to get Cassiopeia x Rek'Sai tips and matchup stats and build suggestions for a a distinct rank, please choose one from the selection menu above. If viewing for the first time, the stats and strategies given are calculated using all games run with both champions.