Fizz's spells scale off Ability Power - consider getting items like Zhonya's Hourglass or Banshee's Veil against teams that have high burst threat - and items like Lich Bane or Rabadon's Deathcap if you think you can survive without the Health.
Since Fizz can move through units, find opportunities in lane to walk through minions and apply Seastone Trident's passive - following it up with the ability's active attack after a few seconds.
Fizz's ultimate ability, Chum the Waters, can be aimed at an enemy or towards the area where you think they'll be going.
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 Fizz 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, Fizz sees a large worsening in his KDA (ratio of kills and assists to deaths) when paired with Sivir. His KDA fell from NaN to NaN. This negative change shows that Sivir helps Fizz perform poorer in ranked LoL rounds. Yet, the small difference indicates that this performance change is only marginal.
When Fizz is paired with Sivir, he gets a little increase in his total damage dealt. This may signal that Sivir helps provide protection for him to deal more damage or that her presence on the team also helps increase the game's duration. Similarly, when Fizz is played together with Sivir on the same side, he usually scores many fewer killing sprees compared to when he plays without Sivir. This is contrasting evidence that he is worse when playing alongside Sivir.
Moreover, when Fizz plays with Sivir on the same team, he typically takes a little more damage than when he fights alone. Getting dealt more damage may indicate that Sivir does a poor job of covering Fizz during team fights.
There is no one best ally for Fizz that will no matter what be his top teammate. However, Sivir is a very typical teammate for Fizz. By locking into the same side as Fizz, she drops their win rate by -0.7% to 51.9%. This clearly indicates that there is a weak synergy between Fizz and Sivir that results in them performing worse together than alone.
Sivir has a lower difficulty than Fizz. That means you don't need to be careful when finding Sivir comrades to go into battle on the same side as, as they will have to have a lower level of skill to be able to do well with you.
Working on the same side, you will likely witness an overall large increase in your team’s capability to deal physical damage. Combined, these two can provide a great amount of sustained physical damage.
Although, by bringing Fizz and Sivir together, you probably will not be providing your side a great deal of support. Plan to have other champions on your team that helps cover this gap in this pairing's capabilities.
Regardless of your Sivir ally's ability, you need to focus on increasing your income, staying alive by avoiding foolish fights, and clearing objectives. If you heed this simple advice, you will do well, regardless.
To truly master Fizz to pair well with Sivir during both the lane and mid / late game phases of League, you should continue reading to pick up some more lessons on this champion pairing. If you listen to the build and stats presented here, you will increase your win rate significantly.
The best finished items to build first in your Fizz and Sivir synergy build include Rabadon's Deathcap, Lich Bane, and Shadowflame. When Fizz bought at least these three great items in his build, he did significantly better as an ally of Sivir than with many other common builds. In fact, Fizz boasted an average winrate of 51.9% helping carry Sivir with these items in his kit.
To have the highest chance of coming out on top against your oponents, you should use the Electrocute, Sudden Impact, Eyeball Collection, Treasure Hunter, Coup de Grace, and Triumph runes from the Domination and Precision rune sets. Of all the rune sets players chose for Fizz and Sivir pairings, this mix of runes yielded the best win rate. Moreover, these runes averaged a 51.9% winrate overall.
By default, tips, statistics, and builds on how to synergize Sivir with Fizz are given for all skill levels combined. If you would like to narrow the statistics and builds to an individual player tier, you may use the selection menu located earlier in the counter matchup guide.