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.
Make the most out of your Icathian Surprise.
Use Void Ooze to set up a perfect Living Artillery.
Kog'Maw can outrange most champions with his Bio-Arcane Barrage ability.
The Karthus Kog'Maw synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Kog'Maw, 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 Kog'Maw. His KDA fell from NaN to NaN. This drop shows that Kog'Maw helps Karthus perform poorer in ranked League matches. Yet, the small difference demonstrates that this performance change is not very impactful.
When Karthus is paired with Kog'Maw, he gets a small increase in his total damage dealt. This may indicate that Kog'Maw helps provide protection for him to dish out more damage or that his support also helps extend the round's duration. Similarly, when Karthus is played together with Kog'Maw on the same side, he usually scores many fewer killing sprees compared to when he plays on his own. This is contrasting evidence that he is worse when playing with Kog'Maw.
Moreover, when Karthus plays with Kog'Maw on the same side, he on average takes more damage than when he fights alone. Getting dealt more damage could mean that Kog'Maw does a poor job of protecting Karthus in team fights.
There is no top synergy for Karthus that will no matter what be his top teammate. Yet, Kog'Maw is a relatively poor ally for Karthus. By locking into the same side as Karthus, he drops their win rate by -1.8% to 45.5%. This shows that there is a harmful bond between Karthus and Kog'Maw that allows them to perform not as well together than without each other.
Kog'Maw has a lower difficulty than Karthus. That means Karthus players don't need to be cautious when arranging Kog'Maw allies to play with, as they will have to have a relatively low level of skill to work well with you.
When playing together, you will likely see an overall large increase in your team’s capability to to do a lot of AP damage. When paired, these champs can blast through enemies with magic damage.
Conversely, by bringing Karthus and Kog'Maw together, you will not be giving your other allies much engage. Plan to bring other champs on your team that nullifies this disparity in this pairing's playstyle.
Regardless of the ability of your Kog'Maw teammate, you should focus on maximizing your gold income, warding to avoid ambushes, and clearing objectives. If you follow these simple suggestions, you should do well, regardless.
If you would like to truly master Karthus to synergize with Kog'Maw during both the early game and mid / late game phases of LoL, you should continue reading to pick up additional tricks and insights into this champion pairing. If you listen to the build and tips shown here, you should grow your win rate by a lot.
The best finished items to build first in your Karthus and Kog'Maw synergy build include Malignance, Stormsurge, and Liandry's Torment. When Karthus included at least these three finished items in his build, he did much better when paired up with Kog'Maw than with most other common item sets. In fact, Karthus boasted an average winrate of 45.5% helping carry Kog'Maw with this build.
To have the greatest chance of defeating your oponents, Karthus players should use the Dark Harvest, Cheap Shot, Eyeball Collection, Ultimate Hunter, Gathering Storm, and Transcendence runes from the Domination and Sorcery rune sets. Out of all the rune combinations players picked for this champion pairing, this order of runes resulted in the top win rate. Notably, these runes averaged a 45.5% win rate overall.
By default, tips, statistics, and builds on how to team up Kog'Maw with Karthus are given for all ranked divisions. To filter the stats and builds to an individual division, you should use the selection menu at the top of this page.