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're in a lane against ranged players, leveling up Meditate can allow you to stay in the lane longer and gain levels faster than they will.
Try using Alpha Strike on a minion in front of an enemy champion so you are placed at a safe distance at the end of the spell.
Wuju Style is very strong early for last hitting minions.
The Karthus Master Yi synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Master Yi, 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 large worsening in his KDA (ratio of kills and assists to deaths) when paired with Master Yi. His KDA decreased from NaN to NaN. This drop shows that Master Yi helps Karthus perform not as well in ranked League of Legends rounds. Yet, the small difference proves that this performance change is only marginal.
When Karthus plays on the same team as Master Yi, he sees a little decrease in his total damage dealt. This difference may signal that Master Yi does not provide protection for him to dish out more damage or that his presence also helps increase the match's duration. Similarly, when Karthus is played together with Master Yi on the same side, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing alongside Master Yi.
Moreover, when Karthus plays with Master Yi on the same side, he usually takes much less damage than when he plays alone. Getting dealt not as much damage may indicate that Master Yi does a decent job of protecting Karthus during teamfights.
There is no ideal ally for Karthus that will no matter what be his #1 synergy. Yet, Master Yi is a decent teammate for Karthus. By being on the same team as Karthus, he improves their win rate by 2.9% to 50.2%. This demonstrates that there is a good bond between Karthus and Master Yi that results in them performing better together than alone.
Master Yi has a much lower diffuclty than Karthus. That means Karthus players don't need to be cautious when enlisting Master Yi allies to fight alongside, as they will need a much lower level of skill to cooperate well with you.
When playing alongside, Karthus players will likely witness an overall large increase in your team’s capability to deal physical damage. When paired, these champs can provide a great amount of sustained physical damage.
Conversely, by bringing Karthus and Master Yi together, you may not be providing your side very much crowd control. Make sure to include other champs on your team that offsets this relative gap in this pairing's abilities.
Regardless of the skill of your Master Yi ally, you need to 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.
If you would like to truly master Karthus to work well with Master Yi during both the early game and mid / late game phases of League, you should continue reading to master some more lessons on this champion pairing. If you listen to the build and stats shown here, you should grow your win rate by a lot.
The ideal finished items to build first in your Karthus and Master Yi synergy build include Rabadon's Deathcap, Shadowflame, and Liandry's Torment. When Karthus bought at least these three great items in his build, he performed a lot better when fighting alongside Master Yi than with most other common item sets. In fact, Karthus boasted an average win rate of 50.2% helping carry Master Yi with this build.
To have the best probability of beating your oponents, you 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. Out of all the rune builds players used for Karthus and Master Yi pairings, this order of runes resulted in the greatest win rate. Notably, these runes provided a 50.2% win rate overall.
If you want to view Karthus and Master Yi cooperations tips and stats for a a particular division, feel free to choose one from the selection menu displayed above. By default, the stats and tips and suggestions displayed are computed using all matches with data with these champs.