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 shown on this page emphasize some strategic Rell vs. Cassiopeia counter statistics that can help us interpret the differences and similarities between the pair. Rell’s KDA ratio ([kills + assists] / deaths) of NaN is more than Cassiopeia’s KDA ratio of NaN, highlighting that Rell may be more central to her team's team fighting capacity than Cassiopeia. This observation is largely a result of the differences in assists.
Rell normally has a significantly smaller longest killing spree than her opponent does. On average, she takes less damage than Cassiopeia. This typically indicates differing health capacities; however, it can also indicate that the one champ has less mobility and thus is not able to kite away from additional harm when engaged or poked.
Both LoL champs are great. Both have their strengths, weaknesses, and counters. In League's current meta, Rell usually loses when facing off against Cassiopeia, with a 48.0% win rate. Therefore, Rell makes a poor counter for Cassiopeia.
While Rell does have a lower win rate compared to Cassiopeia, when they face off with one another, Rell also has a much lower learning curve that makes her a less time consuming champ to develop with. You should be very concerned when picking Rell into Cassiopeia.
Moreover, Rell has a lot of utility and CC, a similar amount to Cassiopeia. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there isn't a single best champion overall in League of Legends, in Rell vs Cassiopeia matchups, Cassiopeia is the better champ with a lower win rate, less champion complexity, and a similar amount of utility to help out your allied champions during teamfights.
Rell is a garbage counter to Cassiopeia. Focus your play on keeping up your CS and clearing objectives. If you are able to do that, you should be able to stand on your own as Rell against Cassiopeia.
If you would like to truly master Rell in order to counter Cassiopeia during both the lane and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tricks and insights into this matchup. If you listen 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.
Rell often racks up a lot less CS relative to Cassiopeia. Champs who typically don't earn many minion kills often don't require much CS to be valuable teammates, such as supports. They are able to scale well off of their abilities and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically need several high cost items to be effective. In either situation, try to do better than the numbers displayed here to do well.
The top items to have in your Rell versus Cassiopeia build consist of Trailblazer, Zeke's Convergence, and Celestial Opposition. When Rell incorporated at least these three pieces in her build, she did a lot better when facing Cassiopeia than with many other commonly used counter builds. In fact, Rell had an average win rate of 48.0% when countering Cassiopeia with this build.
To have the highest chance of annihilating Cassiopeia as Rell, Rell players should use the Glacial Augment, Hextech Flashtraption, Minion Dematerializer, Cosmic Insight, Bone Plating, and Unflinching runes from the Inspiration and Resolve rune sets. Of all the runes we have analyed for Rell vs Cassiopeia LoL games, this set of runes resulted in the best win rate. Moreover, these runes provided a 48.0% winrate overall.
If you want to see Rell x Cassiopeia tips and matchup stats and build suggestions for a an individual division, please choose one from the selection menu provided above. If viewing for the first time, the statistics and guides given are calculated using every match with data with these champs.