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.
The Sion Vex synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Vex, 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 very large drop in his KDA (ratio of kills and assists to deaths) when paired with Vex. His KDA decreased from NaN to NaN. This drop shows that Vex helps Sion perform poorer in ranked LoL rounds. Yet, the small difference demonstrates that this performance change is not very impactful.
When Sion tries to synergize with Vex, he gets a little decrease in his full damage output. This difference may demonstrate that Vex does not provide cover for him to dish out more damage or that their support also helps increase the match's duration. Similarly, when Sion is played alongside Vex on the same team, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing with Vex.
Moreover, when Sion plays with Vex on the same side, he typically receives a little less damage than when he fights alone. Getting dealt not as much damage may mean that Vex does a decent job of protecting Sion during team fights.
There is no ideal ally for Sion that will 100% of the time be his top ally. However, Vex is a good teammate for Sion. By being on the same side as Sion, they raises their win rate by 2.0% to 52.2%. This demonstrates that there is a somewhat important strategic relationship between Sion and Vex that allows them to perform stronger together than alone.
Vex has a much lower diffuclty than Sion. That means you don't need to be cautious when enlisting Vex allies to go into battle on the same side as, as they will need a much lower level of skill to play well with you.
Playing together, Sion players will likely observe an overall large increase in your team’s ability to provide utility and CC for your side. Combined, these champions should be able to manipulate the pace of team fights.
Although, by aligning Sion and Vex together, you probably will not be giving your other allies a great deal of AP. Plan to include other champs on your team that offsets this hole in this pairing's playstyle.
Regardless of the skill of your Vex ally, you should focus on maximizing your gold income, warding to avoid ambushes, and clearing objectives. If you do this, you should do well, regardless.
If you would like to truly master Sion in order to pair well with Vex during both the lane and mid / late game phases of League of Legends rounds, you should keep reading to master a few extra lessons on this champion pairing. If you mind the build and suggestions presented here, you will increase your win rate by a lot.
The most important items to prioritize in your Sion and Vex synergy build consist of Unending Despair, Sunfire Aegis, and Jak'Sho, The Protean. When Sion bought at least these three finished items in his build, he performed a lot better when paired up with Vex than with most other common builds. In fact, Sion had an average winrate of 52.2% helping carry Vex with this build.
To have the best chance of annihilating 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. Out of all the rune sets players chose for this champion pairing, this mixture of runes yielded the greatest win rate. In fact, these runes averaged a 52.2% winrate overall.
If you would like to see Sion and Vex collaboration tips and builds for a an individual rank, feel free to choose one from the selection menu above. By default, the stats and guides shown are calculated using every round completed with these champs.