Sivir's Boomerang Blade returns to her after reaching the max range, so you can shift position to hit enemies who would otherwise have evaded it.
Try saving Spell Shield for enemy abilities that can disable you such as stuns and roots.
Ricochet resets Sivir's basic attack timer on activation, so activating this immediately after landing a normal basic attack will maximize damage output.
Use the time after Sion has died to reposition and prepare for his return.
Even if Sion still hits a Decimating Smash, making him release the charge earlier reduces its impact.
The stat comparisons shown here underscore some critical Sivir versus Sion matchup stats that can help you grasp the distinctions between the two. As an example, Sivir’s KDA ratio ([kills + assists] / deaths) of NaN is better than Sion’s ratio of NaN, demonstrating that Sivir may be more central to her team's team fighting effectiveness than Sion..
Sivir usually has a slightly larger longest kill spree than her matchup does. Commonly, she receives less damage than Sion. This is usually reflective of different amounts of tankyness, but it can also indicate that the one champion has less agility and thus is not able to kite away from further harm when poked or engaged.
Both LoL champs are great champions. Both have their strengths, weaknesses, and counters. In League's current meta, Sivir usually fairs equally well when trying to fight Sion, with a 49.5% win rate. As a result, Sivir makes an ok counter to Sion.
While Sivir does have a lower winrate compared to Sion, when they face off with one another, Sivir also has a lower level of difficulty that makes her a less time consuming champ to pick up and master. You should be careful when picking Sivir into Sion.
Furthermore, Sivir has only a small amount of utility and CC, a similar amount to Sion. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there isn't one best champion in League of Legends, in Sivir vs Sion matchups, Sion is the better champ with a similar win rate, less champion complexity, and a similar amount of utility to help out your allies during team fights.
Sivir is a somewhat poor counter to Sion. Focus your actions on keeping up your CS and taking out objectives. If you do that, you should do very well as Sivir against Sion.
To learn all of the intricacies of Sivir in order to counter Sion during both the lane 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 presented above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Sivir often accumulates a similar amount of CS compared to Sion. Champions who typically don't acquire many minion kills typically don't have to have much CS to be valuable teammates, such as supports. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, typically have to have several high cost items to be effective. In either situation, try to surpass the values displayed on this page to do well.
The best items to focus on in your Sivir versus Sion build include Phantom Dancer, Bloodthirster, and Navori Quickblades. When Sivir bought at least these three items in her build, she performed significantly better versus Sion than with many other typical builds. In fact, Sivir had an average winrate of 49.5% battling Sion with these items in her kit.
To have the highest chance of vanquishing Sion as Sivir, you should take the Lethal Tempo, Presence of Mind, Legend: Bloodline, Coup de Grace, Biscuit Delivery, and Magical Footwear runes from the Precision and Inspiration rune sets. Out of all the runes players chose for Sivir vs Sion counter picks, this order of runes yielded the best win rate. Moreover, these runes gave a 49.5% win rate overall.
If you want to see Sivir versus Sion tips and matchup stats and build suggestions for a an individual division, feel free to select one from the selection menu displayed above. By default, the statistics and guides given are calculated using all matches played with both champs.