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.
Lay Waste is very strong at farming minions and harassing enemy champions.
Ask your allies to help point out when you should use Requiem to get kills in different lanes.
The Janna Karthus synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Karthus, compared to her overall stats. Significant differences are areas of focus that highlight how her gameplay changes when paired with this other champion.
Overall, Janna sees a very large drop in her KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA fell from NaN to NaN. This worsening shows that Karthus helps Janna perform worse in competitive League of Legends games. Yet, the small difference proves that this performance change is not very impactful.
When Janna is paired with Karthus, she observes a little increase in her total damage output. This may demonstrate that Karthus provides cover for her to deal more damage or that his allyship also helps increase the match's duration. Similarly, when Janna is played with Karthus on the same side, he usually scores many fewer killing sprees than when she plays on his own. This is contrasting evidence that she is worse when playing alongside Karthus.
Moreover, when Janna plays with Karthus on the same side, she on average receives more damage than when she plays alone. Receiving more damage could mean that Karthus does a poor job of protecting Janna during team fights.
There is no top ally for Janna that will 100% of the time be her best teammate. Yet, overall, Karthus is a not very good ally for Janna. By playing on the same side as Janna, he lowers their win rate by -2.1% to 48.9%. This proves that there is a negative strategic relationship between Janna and Karthus that allows them to perform worse together than alone.
Karthus has a lower difficulty than Janna. That means Janna players don't need to be cautious when enlisting Karthus comrades to go into battle on the same side as, as they will have to have a relatively low level of skill to be able to play well with you.
When playing cooperatively, you will likely witness an overall large increase in your team’s ability to deal magical damage. Together, these champions can blast through enemies with magic damage.
Conversely, by grouping Janna and Karthus together, you probably will not be giving your team enough anti-tank damage dealing potential. We recommend you pick other champions on your team that nullifies this gap in their abilities.
Regardless of your Karthus ally's ability, you need to focus on maximizing your gold income, staying alive by avoiding foolish fights, and taking down objectives. If you follow these simple suggestions, you will do well anyway.
If you would like to learn all of the intricacies of Janna in order to work well with Karthus during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tips and tricks for this champion pairing. If you pay attention to the build and stats displayed here, you will grow your win rate by a lot.
The most important finished items to get in your Janna and Karthus synergy build include Redemption, Ardent Censer, and Dream Maker. When Janna combined at least these three finished items in her build, she performed much better when fighting alongside Karthus than with most other common builds. In fact, Janna had an average winrate of 48.9% when playing alongside Karthus with these items in her kit.
To have the highest probability of annihilating your oponents, Janna players should equip the Glacial Augment, Magical Footwear, Biscuit Delivery, Cosmic Insight, Font of Life, and Revitalize runes from the Inspiration and Resolve rune sets. Out of all the runes players chose for this team composition, this order of runes resulted in the top win rate. Moreover, these runes averaged a 48.9% win rate overall.
If you need to get Janna with Karthus cooperations tips and stats for a a particular division rank, feel free to select one from the selection menu above. If viewing for the first time, the stats and strategies given are calculated using every game completed with these champs.