Picking up Daggers will significantly reduce Shunpo's cooldown.
Try waiting until the other team is distracted with fighting your team, and use Shunpo to teleport into the fray and unleash a devastating Death Lotus.
Using Shunpo on an allied Champion, Dagger, or minion can be a great escape tactic.
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 Katarina 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, Katarina sees a large worsening in her KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA decreased from NaN to NaN. This worsening shows that Karthus helps Katarina perform poorer in ranked League games. Yet, the small difference proves that this performance change is not very impactful.
When Katarina is paired with Karthus, she sees a marginal improvement in her total damage dealt. This could demonstrate that Karthus helps provide protection for her to dish out more damage or that his allyship also helps extend the match's duration. Similarly, when Katarina is played with Karthus on the same team, he usually scores many fewer killing sprees than when she plays on his own. This is contrasting evidence that she is worse when playing synergisticly with Karthus.
Additionally, when Katarina plays with Karthus on the same side, she typically takes more damage than when she plays alone. Taking more damage may mean that Karthus does a poor job of covering Katarina during team fights.
There is no universally accepted best synergy for Katarina that will always be her top teammate. However, Karthus is a very bad ally for Katarina. By being on the same team as Katarina, he drops their win rate by -3.1% to 45.7%. This signals that there is an easy to overcome and exploit bond between Katarina and Karthus that results in them performing not as well together than alone.
Karthus has a lower difficulty than Katarina. That means Katarina players don't need to be careful when finding Karthus teammates to fight alongside, as they will require a relatively low level of skill to play well with you.
Fighting cooperatively, Katarina players will likely see an overall large increase in your team’s ability to deal magical damage. When paired, these two can deal quite a lot of AP type damage.
In contrast, by pairing Katarina and Karthus together, you probably will not be granting your other allies a great deal of crowd control. Make sure to pick other champs on your team that helps cover this disparity in this pairing's playstyle.
Regardless of the skill of your Karthus ally, you should 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.
To truly master Katarina in order to pair well with Karthus during both the laning and mid / late game phases of LoL games, you should keep reading to learn additional lessons on this champion pairing. If you pay attention to the build and tips shown above, you will grow your win rate by a lot.
The best items to build first in your Katarina and Karthus synergy build consist of Rabadon's Deathcap, Nashor's Tooth, and Shadowflame. When Katarina combined at least these three items in her build, she did a lot better when paired up with Karthus than with many other common builds. In fact, Katarina boasted an average winrate of 45.7% helping carry Karthus with these items in her kit.
To have the greatest probability of vanquishing your oponents, you should equip the Electrocute, Sudden Impact, Eyeball Collection, Relentless Hunter, Coup de Grace, and Triumph runes from the Domination and Precision rune sets. Of all the rune builds players chose for this team composition, this composite of runes yielded the best win rate. Moreover, these runes averaged a 45.7% win rate overall.
If you need to view Katarina and Karthus synergy tips and stats for a an individual player tier, please select one from the selection menu provided above. At first, the stats and strategies shown are computed using every match run with these champs.