Melee allies can stack Frost for your Permafrost, keep an eye on who they are attacking.
Save Glacial Prison for encounters where you have teammates present to take advantage of it.
Use Arctic Assault to escape bad situations, interupt channeled spells or chase runners.
Be wary of Cassiopeia's damage potential with Twin Fang when she has you poisoned.
Turn away from Cassiopeia when she is casting Petrifying Gaze to get slowed instead of stunned.
The stats provided here underscore some important Sejuani against Cassiopeia counter statistics that can help you realize the distinctions between this set of champs. For instance, Sejuani’s KDA ratio ([kills + assists] / deaths) of NaN is better than Cassiopeia’s ratio of NaN, indicating that Sejuani may be more central to her team's team fighting capability than Cassiopeia. This observation is largely caused by the differences in assists.
Sejuani normally has a slightly smaller longest kill spree than her foe does. Typically, she takes more damage than Cassiopeia. This commonly reflects different amounts of tankyness, yet it can also imply that the one champion has less mobility and thus is unable to escape further harm when poked or engaged.
Both League champs are great champions. Both champs have their strengths, weaknesses, and counters. In the game's current meta, Sejuani usually loses when taking on Cassiopeia, with a 48.2% win rate. Thus, Sejuani makes a bad counter for Cassiopeia.
While Sejuani does have a lower winrate than Cassiopeia, when facing one another, Sejuani also has a much lower learning curve that makes her a less challenging champion to learn and master. You should be careful when picking Sejuani into Cassiopeia.
Moreover, Sejuani has a good amount of utility and CC, a similar amount to Cassiopeia. This often makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there is not a single best champion overall in League of Legends, in Sejuani vs Cassiopeia matchups, Cassiopeia is the better champion with a lower win rate, less champion complexity, and a similar amount of utility to help out your allies during team fights.
Sejuani is a somewhat poor counter for Cassiopeia. You will do well by focussing your strategy on increasing your gold income and taking out objectives. If you can do that, you should do very well as Sejuani against Cassiopeia.
To truly master Sejuani to counter Cassiopeia during both the laning 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 listen to the build and tips shown above, you will grow your win rate significantly and be closer to League of Legends pro players.
Sejuani on average accumulates a lot less CS compared to Cassiopeia. Champions who typically don't earn many minion kills typically don't require much CS to be valuable teammates, such as support champions. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually have to have many items to be effective. In either situation, try to surpass the values reported here to do well.
The top items to focus on in your Sejuani versus Cassiopeia build include Sunfire Aegis, Thornmail, and Jak'Sho, The Protean. When Sejuani incorporated at least these three items in her build, she did much better when fighting Cassiopeia than with many other commonly used builds. In fact, Sejuani boasted an average winrate of 48.2% when countering Cassiopeia with this counter build.
To have the best likelihood of vanquishing Cassiopeia as Sejuani, Sejuani players should use the Aftershock, Font of Life, Conditioning, Overgrowth, Legend: Alacrity, and Triumph runes from the Resolve and Precision rune sets. Out of all the rune sets players picked for Sejuani vs Cassiopeia LoL games, this order of runes resulted in the greatest win rate. Moreover, these runes gave a 48.2% win rate overall.
By default, tips, statistics, and builds on how to beat Cassiopeia as Sejuani are given for all ranked divisions. To filter the statistics and builds to a particular skill level, you should use the selection menu located earlier on the page.