Timing Janna's ultimate can push enemies away from a wounded ally or even separate enemies.
Eye of the Storm can be used on allied turrets.
Quickly firing a Howling Gale without the charge up can be used to heavily disable the other team.
The Zeri Janna synergy stats shown here demonstrate the areas of their gameplay that do better (or worse) when paired with Janna, compared to their overall stats. Significant differences are areas of focus that highlight how their gameplay changes when paired with this other champion.
Overall, Zeri sees a very large drop in their KDA (ratio of kills and assists to deaths) when paired with Janna. His KDA fell from NaN to NaN. This fall shows that Janna helps Zeri perform not as well in competitive League rounds. Yet, the small difference indicates that this performance change is only marginal.
When Zeri is an ally to Janna, they sees a little increase in their total damage dealt. This difference could demonstrate that Janna helps provide cover for them to dish out more damage or that her allyship also helps extend the game's duration. Similarly, when Zeri is played with Janna on the same team, he usually scores many fewer killing sprees compared to when they plays alone. This is contrasting evidence that they is worse when playing with Janna.
Additionally, when Zeri plays with Janna on the same team, they on average takes less damage than when they plays alone. Taking not as much damage could mean that Janna does a decent job of covering Zeri in teamfights.
There is no one best synergy for Zeri that will always be their ideal ally. Yet, overall, Janna is a good ally for Zeri. By locking into the same team as Zeri, she increases their win rate by 2.8% to 49.0%. This proves that there is pretty good bond between Zeri and Janna that allows them to perform at the top of their game together than without each other.
Janna has a greater difficulty than Zeri. That means you need to be very careful when enlisting Janna teammates to fight alongside, as they will have to have a greater level of skill to be able to cooperate well with you.
Playing cooperatively, you should expect to witness an overall large increase in your team’s capacity to support your allies. Combined, these champions should be able to manipulate the pace of team fights.
Although, by pairing Zeri and Janna together, you probably will not be providing your other allies much magical damage output. Plan to bring other champions on your team that fills this relative hole in their capabilities.
Regardless of your Janna ally's skill level, you need to focus on maximizing your income, warding to avoid ambushes, and clearing objectives. If you do this, you should do well, regardless.
If you would like to truly master Zeri to pair well with Janna during both the early game and mid / late game phases of League matches, you should continue reading to master additional tips and tricks for this champion pairing. If you mind the build and suggestions shown here, you should increase your win rate significantly.
The best items to have in your Zeri and Janna synergy build include Bloodthirster, Experimental Hexplate, and Runaan's Hurricane. When Zeri included at least these three great items in their build, they did much better as an ally of Janna than with many other common builds. In fact, Zeri boasted an average winrate of 49.0% when synergizing their build and playstyle to Janna with these items in their kit.
To have the greatest likelihood of annihilating your oponents, Zeri players should equip the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Conditioning, and Overgrowth runes from the Precision and Resolve rune sets. Of all the rune builds players picked for Zeri and Janna pairings, this combination of runes resulted in the best win rate. Notably, these runes provided a 49.0% win rate overall.
By default, tips, stats, and builds on how to pair Janna with Zeri are displayed for all ranked divisions combined. If you want to scope the stats and builds to a distinct division, you can use the selection menu located earlier in the counter matchup guide.