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.
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.
The Jayce Sivir synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Sivir, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Jayce sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Sivir. His KDA decreased from NaN to NaN. This worsening shows that Sivir helps Jayce perform poorer in competitive League rounds. Yet, the small difference demonstrates that this performance change is only marginal.
When Jayce plays on the same team as Sivir, he gets a marginal improvement in his full damage dealt. This difference could signal that Sivir helps provide cover for him to dish out more damage or that her participation also helps increase the round's duration. Similarly, when Jayce is played with Sivir 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 Sivir.
Additionally, when Jayce plays with Sivir on the same team, he often receives a little more damage than when he plays alone. Taking more damage may indicate that Sivir does a poor job of protecting Jayce during team fights.
There is no universally accepted best champion pairing for Jayce that will 100% of the time be his #1 teammate. Yet, Sivir is a relatively poor ally for Jayce. By being on the same side as Jayce, she drops their win rate by -1.9% to 45.9%. This clearly indicates that there is a negative strategic relationship between Jayce and Sivir that allows them to perform worse together than without each other.
Sivir has a much lower diffuclty than Jayce. That means you don't need to be very careful when enlisting Sivir teammates to go into battle on the same side as, as they will need a much lower level of skill to be able to cooperate well with you.
Working cooperatively, you should expect to observe an overall large increase in your team’s ability to deal physical damage. Together, these champions can tear through the other team with a lot of physcial damage.
Conversely, by grouping Jayce and Sivir together, you will not be granting your side enough magic damage. Make sure to bring other champions on your team that nullifies this disparity in their potential.
Regardless of your Sivir ally's ability, you should focus on increasing your gold income, warding to avoid ambushes, and taking down objectives. If you do this, you should do well anyway.
If you would like to truly master Jayce in order to pair well with Sivir during both the lane and mid / late game phases of League of Legends rounds, you should continue reading to master additional lessons on this champion pairing. If you pay attention to the build and suggestions displayed here, you will grow your win rate by a lot.
The most important finished items to have in your Jayce and Sivir synergy build consist of Muramana, Youmuu's Ghostblade, and Edge of Night. When Jayce combined at least these three great items in his build, he performed much better when fighting alongside Sivir than with most other common item sets. In fact, Jayce had an average win rate of 45.9% helping carry Sivir with these items in his kit.
To have the highest chance of coming out on top against your oponents, Jayce players should use the First Strike, Magical Footwear, Biscuit Delivery, Cosmic Insight, Manaflow Band, and Transcendence runes from the Inspiration and Sorcery rune sets. Of all the rune combinations players picked for this champion pairing, this blending of runes yielded the best win rate. Notably, these runes provided a 45.9% win rate overall.
By default, tips, stats, and builds on how to pair Sivir with Jayce are shown for all skill levels combined. If you want to scope the statistics and builds to a distinct rank, you can use the selection menu above.