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 stat comparisons provided here highlight several strategic Senna versus Cassiopeia counter statistics that can help us explain the distinctions between the two. As an example, Senna’s KDA ratio ([kills + assists] / deaths) of NaN is better than Cassiopeia’s KDA ratio of NaN, showing that Senna may be more central to her team's team fighting potential than Cassiopeia. This observation is in large part fueled by the differences in assists.
Senna normally has a slightly smaller longest kill spree than her foe does. On average, she receives less damage than Cassiopeia. This commonly reflects different amounts of tankyness, yet it can also hint that the one champ has less mobility and thus is not able to flee from further harm when poked or engaged.
Both League champions are great champions. Both champs have their strengths, weaknesses, and counters. In League's current meta, Senna usually fairs equally well when taking on Cassiopeia, with a 50.9% win rate. Thus, Senna makes an ok counter for Cassiopeia.
While Senna does have a higher winrate compared to Cassiopeia, when facing one another, Senna also has a lower learning curve that makes her a less difficult champ to learn and master. You still need to be cautious when picking Senna into Cassiopeiaas her relative depth means you may not be able to reach her full potential without a lot of practice beforehand.
Additionally, Senna also has a good amount of utility and CC, a similar amount to Cassiopeia. This often makes her just as valuable during team fights, especially when fighting champions with a ton of burst damage.
While there is not one best champion for every situation in League of Legends, in Senna vs Cassiopeia matchups, Senna is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your teammates during teamfights.
Senna is a decent counter for Cassiopeia. Make sure you focus your play on keeping up your CS and taking out objectives. If you do that, you should hold your own as Senna against Cassiopeia.
If you would like to learn all of the intricacies of Senna to counter Cassiopeia during both the laning and mid / late game phases of League of Legends, you should continue reading to learn a few extra tricks and insights into this matchup. If you mind the build and suggestions presented here, you should increase your win rate significantly and be closer to League of Legends pro players.
Senna often picks up less CS relative to Cassiopeia. Champs who on average don't get much CS usualy don't require much CS to be valuable teammates, such as supports. These kinds of champions are able to scale well off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically require several high cost items to be effective. In either case, try to exceed the numbers reported here to do well.
The most crucial items to have in your Senna versus Cassiopeia build consist of Youmuu's Ghostblade, Bloodsong, and Voltaic Cyclosword. When Senna used at least these three pieces in her build, she did significantly better vs Cassiopeia than with most other typical item sets. In fact, Senna boasted an average winrate of 50.9% when countering Cassiopeia with this counter build.
To have the greatest chance of coming out on top against Cassiopeia as Senna, Senna players should use the Fleet Footwork, Presence of Mind, Legend: Alacrity, Cut Down, Bone Plating, and Revitalize runes from the Precision and Resolve rune sets. Of all the runes players used for Senna vs Cassiopeia matchups, this composite of runes resulted in the highest win rate. In fact, these runes provided a 50.9% winrate overall.
By default, tips, stats, and builds on how to beat Cassiopeia as Senna are given for all ranked divisions. If you want to scope the stats and builds to a particular division, you can use the selection menu located earlier in the counter matchup guide.