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.
If you have trouble landing Prismatic Barrier, remember that it returns to you after it reaches max range. Try positioning yourself to hit your allies with its return trip.
Lux has great zone control abilities. Try to set up Lucent Singularity to prevent an enemy's advance or escape.
Lucent Singularity is a great scouting tool. Try throwing it into brush before walking into it to check for ambushes.
The Karthus Lux synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Lux, 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 Lux. His KDA decreased from NaN to NaN. This fall shows that Lux helps Karthus perform poorer in competitive League games. Yet, the small difference shows that this performance change is only marginal.
When Karthus tries to synergize with Lux, he gets a small increase in his total damage output. This change could signal that Lux provides protection for him to dish out more damage or that her presence on the team also helps extend the match's duration. Similarly, when Karthus is played with Lux on the same side, he usually scores many fewer killing sprees compared to when he plays without Lux. This is contrasting evidence that he is worse when playing with Lux.
Moreover, when Karthus plays with Lux on the same side, he usually receives a little more damage than when he fights alone. Receiving more damage could mean that Lux does a poor job of protecting Karthus during team fights.
There is no top ally for Karthus that will no matter what be his top ally. However, Lux is a very typical teammate for Karthus. By being on the same team as Karthus, she decreases their win rate by -1.0% to 46.3%. This shows that there is not really a strong strategic relationship between Karthus and Lux that allows them to perform worse together than alone.
Lux has a lower difficulty than Karthus. That means you don't need to be cautious when lining up Lux allies to play with, as they will have to have a relatively low level of skill to be able to do well with you.
Working alongside, you should witness an overall large increase in your team’s ability to deal magic damage. When paired, these two are able to dish out a surprising amount of magic type damage.
In contrast, by bringing Karthus and Lux together, you may not be providing your other allies a lot of sustained damage output. Make sure to bring other champs on your team that offsets this hole in this pairing's kit.
Regardless of your Lux ally's skill level, you need to focus on maximizing your income, warding to avoid ambushes, and clearing objectives. If you follow these simple suggestions, you will do well anyway.
To truly master Karthus to work well with Lux during both the laning and mid / late game phases of League games, you should keep reading to gather additional tricks and insights into this champion pairing. If you use the build and stats displayed here, you will grow your win rate significantly.
The most crucial finished items to prioritize in your Karthus and Lux synergy build include Rabadon's Deathcap, Void Staff, and Shadowflame. When Karthus included at least these three pieces in his build, he did significantly better when paired up with Lux than with many other common item sets. In fact, Karthus boasted an average winrate of 46.3% when synergizing his build and playstyle to Lux with this build.
To have the highest chance of vanquishing your oponents, Karthus players should take the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Eyeball Collection, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Out of all the rune sets we have analyed for this team composition, this mix of runes resulted in the highest win rate. Notably, these runes gave a 46.3% win rate overall.
By default, tips, stats, and builds on how to team up Lux with Karthus are displayed for all ranked divisions combined. To narrow the statistics and builds to a particular skill level, you can use the selection menu located at the top of this page.