Using Distortion can help your positioning to land Ethereal Chains.
You can chain Sigil of Malice and Ethereal Chains to prevent characters with blink from escaping for up to 4 seconds.
Distortion allows you to be aggressive with your other spells while being able to return to safety.
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 LeBlanc Karthus synergy stats shown here demonstrate the areas of her gameplay that do better (or worse) when paired with Karthus, compared to her overall stats. Significant differences are areas of focus that highlight how her gameplay changes when paired with this other champion.
Overall, LeBlanc sees a very large drop in her KDA (ratio of kills and assists to deaths) when paired with Karthus. His KDA went down from NaN to NaN. This negative change shows that Karthus helps LeBlanc perform worse in competitive LoL games. Yet, the small difference demonstrates that this performance change is only marginal.
When LeBlanc plays on the same team as Karthus, she gets a little increase in her complete damage dealt. This change may indicate that Karthus supports by providing protection for her to deal more damage or that his allyship also helps increase the round's duration. Similarly, when LeBlanc is played alongside Karthus on the same side, he usually scores many fewer killing sprees than when she plays without Karthus. This is contrasting evidence that she is worse when playing with Karthus.
Additionally, when LeBlanc plays with Karthus on the same team, she typically takes more damage than when she plays alone. Receiving more damage could indicate that Karthus does a poor job of covering LeBlanc in teamfights.
There is no universally accepted best champion pairing for LeBlanc that will 100% of the time be her best ally. Yet, overall, Karthus is a below average companion for LeBlanc. By locking into the same team as LeBlanc, he lowers their win rate by -3.0% to 43.8%. This clearly indicates that there is a negative synergy between LeBlanc and Karthus that results in them performing not as well together than alone.
Karthus has a lower difficulty than LeBlanc. That means you don't need to be careful when finding Karthus teammates to fight alongside, as they will have to have a relatively low level of skill to be able to work well with you.
Fighting on the same side, LeBlanc players should expect to see an overall large increase in your team’s capability to deal magic damage. When paired, these champs can deal quite a lot of AP type damage.
In contrast, by pairing LeBlanc and Karthus together, you may not be giving your team very much attack damage. Plan to include other champions on your team that nullifies this relative hole in this pairing's kit.
Regardless of your Karthus ally's skill level, you should focus on maximizing your gold income, warding to avoid ambushes, and clearing objectives. If you do this, you will do well, regardless.
If you would like to learn all of the intricacies of LeBlanc in order to synergize with Karthus during both the laning and mid / late game phases of League matches, you should keep reading to gather a few extra tips and tricks for this champion pairing. If you mind the build and stats presented here, you will grow your win rate significantly.
The ideal finished items to have in your LeBlanc and Karthus synergy build include Statikk Shiv, Rapid Firecannon, and Voltaic Cyclosword. When LeBlanc included at least these three great items in her build, she performed much better as an ally of Karthus than with most other typical item sets. In fact, LeBlanc boasted an average win rate of 43.8% when synergizing her build and playstyle to Karthus with this build.
To have the greatest chance of coming out on top against your oponents, LeBlanc players should take the Electrocute, Taste of Blood, Eyeball Collection, Treasure Hunter, Manaflow Band, and Scorch runes from the Domination and Sorcery rune sets. Out of all the runes players picked for LeBlanc and Karthus pairings, this combination of runes resulted in the greatest win rate. Moreover, these runes averaged a 43.8% win rate overall.
By default, tips, statistics, and builds on how to pair Karthus with LeBlanc are shown for all skill levels, merged. If you would like to narrow the statistics and builds to a specific rank, you may use the selection menu located above.