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.
Spreading out Hextech Micro-Rockets leads to more reliable damage and more efficiency against multiple targets, but focusing it creates the biggest impact.
The success of Electron Storm Grenade is very important to Heimerdinger's survival. The slow and stun both are capable of keeping enemies in place long enough to punish them, but it is also the first line of defense against a surprise attack.
Turret placement can be a deciding factor in a battle. Against most enemies turrets are best when they can support each other, but if the enemy has a lot of area of effect damage your turrets can be destroyed quickly. Placing turrets in brush can lead to a surprise attack in your favor.
The Karthus Heimerdinger synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Heimerdinger, 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 Heimerdinger. His KDA fell from NaN to NaN. This fall shows that Heimerdinger helps Karthus perform worse in competitive LoL games. Yet, the small difference proves that this performance change is only marginal.
When Karthus plays on the same team as Heimerdinger, he gets a barely noticable drop in his full damage dealt. This change could signal that Heimerdinger does not support by providing protection for him to dish out more damage or that his support also helps extend the match's duration. Similarly, when Karthus is played alongside Heimerdinger on the same team, he usually scores many fewer killing sprees than when he plays without Heimerdinger. This is contrasting evidence that he is worse when playing synergisticly with Heimerdinger.
Moreover, when Karthus plays with Heimerdinger on the same side, he typically takes a little more damage than when he plays alone. Getting dealt more damage may indicate that Heimerdinger does a poor job of protecting Karthus in team fights.
There is no perfect companion for Karthus that will no matter what be his best teammate. However, Heimerdinger is a very bad teammate for Karthus. By being on the same side as Karthus, he lowers their win rate by -3.8% to 43.5%. This shows that there is a terrible strategic relationship between Karthus and Heimerdinger that allows them to perform not as well together than alone.
Heimerdinger has a greater difficulty than Karthus. That means Karthus players need to be very careful when lining up Heimerdinger comrades to play with, as they will require a greater level of skill to be able to play well with you.
Working alongside, Karthus players should expect to see an overall large increase in your team’s capacity to to do a lot of AP damage. Together, these champions can blast through enemies with magic damage.
Conversely, by grouping Karthus and Heimerdinger together, you may not be providing your other allies a great deal of AD. We recommend you include other champions on your team that neutralizes this gap in this pairing's potential.
Regardless of the skill of your Heimerdinger ally, you should focus on increasing your gold income, warding to avoid ambushes, and clearing objectives. If you heed this simple advice, you should do well anyway.
To learn all of the intricacies of Karthus to work well with Heimerdinger 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 use the build and stats displayed here, you will increase your win rate by a lot.
The best finished items to prioritize in your Karthus and Heimerdinger synergy build include Malignance, Stormsurge, and Liandry's Torment. When Karthus used at least these three pieces in his build, he did much better when fighting alongside Heimerdinger than with most other commonly used builds. In fact, Karthus had an average win rate of 43.5% helping carry Heimerdinger with this build.
To have the greatest chance of crushing 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 combinations players picked for this team composition, this mix of runes yielded the greatest win rate. Moreover, these runes averaged a 43.5% winrate overall.
By default, tips, stats, and builds on how to team up Heimerdinger with Karthus are given for all ranked divisions combined. If you want to narrow the statistics and builds to a specific player tier, you should use the selection menu above.