Picking up goo chunks is very important to staying alive.
When Cell Division is ready, try to die in a position that makes it difficult for the enemy team to kill your bloblets.
Charging Elastic Slingshot from the fog of war will give opponents less time to react.
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 Zac Karthus synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Karthus, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Zac sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA worsened from NaN to NaN. This decrease shows that Karthus helps Zac perform not as well in competitive LoL matches. Yet, the small difference demonstrates that this performance change is not very impactful.
When Zac is paired with Karthus, he gets a marginal improvement in his total damage output. This could signal that Karthus helps provide protection for him to deal more damage or that his allyship also helps extend the match's duration. Similarly, when Zac is played together with Karthus on the same side, he usually scores many fewer killing sprees than when he plays without Karthus. This is contrasting evidence that he is worse when playing with Karthus.
Additionally, when Zac plays with Karthus on the same team, he typically receives a little more damage than when he plays alone. Taking more damage may mean that Karthus does a poor job of protecting Zac in teamfights.
There is no one best companion for Zac that will always be his best teammate. Yet, Karthus is a relatively poor ally for Zac. By playing on the same side as Zac, he lowers their win rate by -1.1% to 50.7%. This demonstrates that there is a bad bond between Zac and Karthus that results in them performing not as well together than alone.
Karthus has a lower difficulty than Zac. That means Zac players don't need to be very careful when arranging Karthus teammates to fight alongside, as they will have to have a lower level of skill to do well with you.
When playing on the same side, you should expect to observe an overall large increase in your team’s ability to deal magical damage. When paired, these champions can blast through enemies with magic damage.
Although, by grouping Zac and Karthus together, you will not be giving your team a great deal of anti-tank damage dealing potential. Plan to include other champs on your team that helps cover this disparity in their abilities.
Regardless of your Karthus ally's skill level, you need to focus on maximizing your gold income, staying alive by avoiding foolish fights, and clearing objectives. If you do this, you will do well anyway.
If you would like to truly master Zac to work well with Karthus during both the laning and mid / late game phases of League rounds, you should continue reading to pick up a few extra tricks and insights into this champion pairing. If you mind the build and tips displayed above, you should grow your win rate significantly.
The most important items to focus on in your Zac and Karthus synergy build consist of Spirit Visage, Sunfire Aegis, and Thornmail. When Zac incorporated at least these three great items in his build, he did significantly better when paired up with Karthus than with many other commonly used item sets. In fact, Zac boasted an average win rate of 50.7% helping carry Karthus with this build.
To have the greatest chance of crushing your oponents, Zac players should take the Aftershock, Font of Life, Conditioning, Revitalize, Legend: Tenacity, and Triumph runes from the Resolve and Precision rune sets. Of all the rune combinations players used for this champion pairing, this order of runes yielded the top win rate. In fact, these runes gave a 50.7% win rate overall.
If you want to see Zac with Karthus collaboration tips and stats for a an individual rank, feel free to select one from the selection menu shown above. By default, the stats and guides displayed are calculated using all matches with data with both champions.