Melee allies can stack Frost for your Permafrost, keep an eye on who they are attacking.
Save Glacial Prison for encounters where you have teammates present to take advantage of it.
Use Arctic Assault to escape bad situations, interupt channeled spells or chase runners.
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 Sejuani 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, Sejuani sees a large worsening in her KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA went down from NaN to NaN. This decrease shows that Karthus helps Sejuani perform not as well in competitive LoL rounds. Yet, the small difference proves that this performance change is only marginal.
When Sejuani is paired with Karthus, she sees a small increase in her total damage output. This difference may demonstrate that Karthus helps provide cover for her to deal more damage or that his presence also helps extend the round's duration. Similarly, when Sejuani is played with Karthus on the same side, he usually scores many fewer killing sprees compared to when she plays without Karthus. This is contrasting evidence that she is worse when playing synergisticly with Karthus.
Moreover, when Sejuani plays with Karthus on the same team, she usually takes a little more damage than when she fights alone. Receiving more damage could mean that Karthus does a poor job of covering Sejuani in team fights.
There is no one best champion pairing for Sejuani that will always be her #1 teammate. However, overall, Karthus is a very bad ally for Sejuani. By playing on the same side as Sejuani, he decreases their win rate by -6.0% to 40.9%. This proves that there is a very bad bond between Sejuani and Karthus that allows them to perform not as well together than alone.
Karthus has a greater difficulty than Sejuani. That means you should be careful when finding Karthus allies to go into battle on the same side as, as they will require a greater level of skill to be able to fight well with you.
Playing alongside, Sejuani players should expect to observe an overall large increase in your team’s capacity to deal magic damage. Together, these two can blast through enemies with magic damage.
Although, by bringing Sejuani and Karthus together, you probably will not be granting your side enough anti-tank damage dealing potential. We recommend you bring other champions on your team that nullifies this relative disparity in their capabilities.
Regardless of your Karthus ally's skill level, you should focus on increasing your income, outlasting your enemies, and clearing objectives. If you follow these simple suggestions, you will do well anyway.
To learn all of the intricacies of Sejuani to pair well with Karthus during both the laning and mid / late game phases of League matches, you should continue reading to master additional tricks and insights into this champion pairing. If you pay attention to the build and suggestions shown here, you will grow your win rate significantly.
The ideal items to have in your Sejuani and Karthus synergy build include Kaenic Rookern, Sunfire Aegis, and Iceborn Gauntlet. When Sejuani bought at least these three finished items in her build, she performed a lot better as an ally of Karthus than with many other typical item sets. In fact, Sejuani had an average winrate of 40.9% helping carry Karthus with this build.
To have the highest likelihood of crushing your oponents, you should use the Aftershock, Font of Life, Conditioning, Overgrowth, Legend: Alacrity, and Triumph runes from the Resolve and Precision rune sets. Out of all the rune builds players chose for this champion pairing, this blending of runes yielded the best win rate. Moreover, these runes provided a 40.9% win rate overall.
By default, tips, statistics, and builds on how to synergize Karthus with Sejuani are presented for all skill levels, merged. To filter the stats and builds to an individual rank, you should use the selection menu at the top of this page.