Roar of the Slayer is a great setup ability to land a very powerful Decimating Smash.
The Soul Furnace buff displays how much shield strength is remaining, use this information to time its explosion perfectly.
You only have very slight turning ability during Unstoppable Onslaught, so make sure to use it in straight paths.
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.
The Sion Cassiopeia synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Cassiopeia, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Sion sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Cassiopeia. His KDA went down from NaN to NaN. This negative change shows that Cassiopeia helps Sion perform worse in competitive League matches. Yet, the small difference proves that this performance change is only marginal.
When Sion is an ally to Cassiopeia, he gets a small increase in his full damage dealt. This difference may signal that Cassiopeia provides protection for him to deal more damage or that her participation also helps extend the game's duration. Similarly, when Sion is played alongside Cassiopeia on the same team, he usually scores many fewer killing sprees compared to when he plays on his own. This is contrasting evidence that he is worse when playing alongside Cassiopeia.
Moreover, when Sion plays with Cassiopeia on the same side, he on average takes a little more damage than when he fights alone. Taking more damage may indicate that Cassiopeia does a poor job of covering Sion in team fights.
There is no perfect synergy for Sion that will no matter what be his #1 ally. However, Cassiopeia is a great teammate for Sion. By locking into the same team as Sion, she increases their win rate by 3.6% to 54.0%. This shows that there is a very strong strategic relationship between Sion and Cassiopeia that results in them performing better together than alone.
Cassiopeia has a much greater difficulty compared to Sion. That means Sion players need to be cautious when arranging Cassiopeia teammates to play with, as they will need a much higher level of skill to be able to work well with you.
When playing cooperatively, you will likely witness an overall large increase in your team’s capacity to deal magic damage. Combined, these two are able to dish out a surprising amount of magic type damage.
Although, by pairing Sion and Cassiopeia together, you may not be providing your side enough sustained damage output. Make sure to pick other champs on your team that offsets this hole in this pairing's kit.
Regardless of the ability of your Cassiopeia ally, you should focus on increasing your gold income, warding to avoid ambushes, and clearing objectives. If you heed this simple advice, you should do well anyway.
If you would like to truly master Sion in order to work well with Cassiopeia during both the laning and mid / late game phases of League of Legends games, you should keep reading to pick up a few extra tips and tricks for this champion pairing. If you listen to the build and tips presented above, you will increase your win rate by a lot.
The most important items to focus on in your Sion and Cassiopeia synergy build include Heartsteel, Sunfire Aegis, and Hullbreaker. When Sion combined at least these three items in his build, he did significantly better as an ally of Cassiopeia than with many other common builds. In fact, Sion boasted an average win rate of 54.0% when playing alongside Cassiopeia with this build.
To have the highest likelihood of vanquishing your oponents, you should use the Grasp of the Undying, Demolish, Conditioning, Overgrowth, Approach Velocity, and Minion Dematerializer runes from the Resolve and Inspiration rune sets. Of all the runes players chose for this champion pairing, this sequence of runes yielded the highest win rate. In fact, these runes provided a 54.0% win rate overall.
By default, tips, statistics, and builds on how to pair Cassiopeia with Sion are presented for every ranked division. To filter the statistics and builds to a particular rank, you may use the selection menu at the top of this page.