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.
For increased range and damage, try casting Shock Blast through the Acceleration Gate.
If you find yourself taking lots of damage, try using Jayce's Hammer Stance, as it grants you additional defenses.
Be sure to switch stances often. It will enhance your attacks and grant you quick bursts of speed.
The Karthus Jayce synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Jayce, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Karthus sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Jayce. His KDA went down from NaN to NaN. This decrease shows that Jayce helps Karthus perform worse in competitive League of Legends games. Yet, the small difference indicates that this performance change is not very impactful.
When Karthus tries to synergize with Jayce, he gets a little drop in his complete damage dealt. This may demonstrate that Jayce doesn't help cover for him to deal more damage or that his participation also helps increase the game's duration. Similarly, when Karthus is played with Jayce on the same team, he usually scores many fewer killing sprees than when he plays without Jayce. This is contrasting evidence that he is worse when playing with Jayce.
Additionally, when Karthus plays with Jayce on the same side, he on average takes a little less damage than when he fights alone. Getting dealt not as much damage may indicate that Jayce does a decent job of protecting Karthus in team fights.
There is no perfect companion for Karthus that will 100% of the time be his #1 teammate. Yet, overall, Jayce is a very typical companion for Karthus. By playing on the same side as Karthus, he decreases their win rate by -0.1% to 47.2%. This proves that there is only a small synergy between Karthus and Jayce that results in them performing not as well together than without each other.
Jayce has a lower difficulty than Karthus. That means Karthus players don't need to be very careful when finding Jayce comrades to go into battle on the same side as, as they will require a lower level of skill to be able to work well with you.
Fighting on the same side, you should expect to observe an overall large increase in your team’s capacity to deal magic damage. When paired, these champions are able to dish out a surprising amount of magic type damage.
In contrast, by grouping Karthus and Jayce together, you probably will not be providing your other teammates a lot of engage potential. Plan to include other champions on your team that nullifies this hole in this pairing's capabilities.
Regardless of the ability of your Jayce ally, you need to focus on increasing your income, outlasting your enemies, and taking down objectives. If you heed this simple advice, you should do well, regardless.
If you would like to truly master Karthus to pair well with Jayce during both the early game and mid / late game phases of League rounds, you should continue reading to learn additional lessons on this champion pairing. If you mind the build and suggestions shown here, you will grow your win rate significantly.
The top items to build first in your Karthus and Jayce synergy build consist of Malignance, Stormsurge, and Liandry's Torment. When Karthus used at least these three finished items in his build, he performed much better when paired up with Jayce than with most other common item sets. In fact, Karthus had an average win rate of 47.2% helping carry Jayce with these items in his kit.
To have the greatest likelihood of beating your oponents, Karthus players should take the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Presence of Mind, and Last Stand runes from the Domination and Precision rune sets. Of all the rune combinations that we analyzed for this team composition, this mixture of runes resulted in the highest win rate. Moreover, these runes averaged a 47.2% winrate overall.
By default, tips, statistics, and builds on how to pair Jayce with Karthus are displayed for all skill levels combined. To filter the statistics and builds to an individual rank, you can use the selection menu above.