For increased range and damage, try casting Shock Blast through the Acceleration Gate.
If you find yourself taking lots of damage, try using Jayce's Hammer Stance, as it grants you additional defenses.
Be sure to switch stances often. It will enhance your attacks and grant you quick bursts of speed.
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 provided here show some strategic Jayce versus Sion matchup stats that may help you explain the distinctions between the pair. Jayce’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Sion’s ratio of NaN, demonstrating that Jayce may be more central to his team's team fighting capacity than Sion..
Jayce often has a slightly larger longest kill spree than his matchup does. On average, he receives less damage than Sion. This commonly reflects different amounts of tankyness, but it can also indicate that the one champion has less agility and thus is unable to flee from further harm when poked or engaged.
Both League of Legends champions are great. Both have their strengths, weaknesses, and counters. In League's current meta, Jayce usually loses when trying to fight Sion, with a 46.4% win rate. Therefore, Jayce makes a poor counter for Sion.
While Jayce does have a lower winrate than Sion, when facing one another, Jayce also has a greater level of difficulty that makes him a more challenging champion to pick up and master. You may get destroyed when picking Jayce into Sionas his relative depth means that you may not be able to unleash his full potential without a significant amount of practice beforehand.
Additionally, Jayce has almost no amount of utility and CC, a similar amount to Sion. This makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there isn't one best champion overall in League of Legends, in Jayce vs Sion matchups, Sion is the better champ with a much lower win rate, more champion depth, and a similar amount of utility to help out your team members during team fights.
Jayce is a garbage counter for Sion. You will do well by focussing your gameplay on keeping up your gold and cs and destroying objectives. If you can do that, you should do very well as Jayce against Sion.
If you would like to truly master Jayce to counter Sion during both the laning and mid / late game phases of League of Legends, you should keep reading to learn a few extra lessons on this matchup. If you listen to the build and stats presented above, you will increase your win rate significantly and be that much closer to League of Legends pro players.
Jayce often gets a similar amount of CS relative to Sion. Champs who on average don't earn many minion kills typically don't have to have much CS to be effective, such as supports. These kinds of champions are able to scale well off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually have to have several high cost items to be effective. In either situation, try to exceed the values shown here to do well.
The most important items to use in your Jayce versus Sion build consist of Muramana, Eclipse, and Serylda's Grudge. When Jayce incorporated at least these three items in his build, he did significantly better versus Sion than with many other common item sets. In fact, Jayce had an average winrate of 46.4% when playing against Sion with this build.
To have the greatest probability of beating Sion as Jayce, Jayce players should take the First Strike, Magical Footwear, Biscuit Delivery, Cosmic Insight, Manaflow Band, and Transcendence runes from the Inspiration and Sorcery rune sets. Out of all the rune builds players chose for Jayce vs Sion matchups, this sequence of runes yielded the highest win rate. In fact, these runes provided a 46.4% winrate overall.
By default, tips, statistics, and builds on how to beat Sion as Jayce are presented for all ranked divisions. If you would like to narrow the statistics and builds to a particular player tier, you can use the selection menu earlier on the page.