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.
Use Demacian Standard as a scouting tool when worried about incoming enemies.
You can use the Dragon Strike / Demacian Standard combo to get out of your own Cataclysm arenas.
Split your basic attacks on different champions at the beginning of fights to maximize damage.
The Kog'Maw Jarvan IV synergy stats shown here demonstrate the areas of his gameplay that do better (or worse) when paired with Jarvan IV, compared to his overall stats. Significant differences are areas of focus that highlight how his gameplay changes when paired with this other champion.
Overall, Kog'Maw sees a very large drop in his KDA (ratio of kills and assists to deaths) when paired with Jarvan IV. His KDA went down from NaN to NaN. This worsening shows that Jarvan IV helps Kog'Maw perform poorer in ranked LoL games. Yet, the small difference shows that this performance change is only marginal.
When Kog'Maw tries to synergize with Jarvan IV, he sees a small increase in his full damage dealt. This change may demonstrate that Jarvan IV supports by providing cover for him to deal more damage or that his support also helps extend the game's duration. Similarly, when Kog'Maw is played alongside Jarvan IV on the same team, he usually scores many fewer killing sprees than when he plays alone. This is contrasting evidence that he is worse when playing alongside Jarvan IV.
Additionally, when Kog'Maw plays with Jarvan IV on the same side, he typically takes a little less damage than when he plays alone. Receiving not as much damage may indicate that Jarvan IV does a decent job of covering Kog'Maw during team fights.
There is no ideal synergy for Kog'Maw that will 100% of the time be his #1 teammate. However, overall, Jarvan IV is a very typical teammate for Kog'Maw. By playing on the same side as Kog'Maw, he drops their win rate by -0.4% to 48.6%. This proves that there is not really a strong bond between Kog'Maw and Jarvan IV that results in them performing worse together than without each other.
Jarvan IV has a lower difficulty than Kog'Maw. That means Kog'Maw players don't need to be very careful when finding Jarvan IV allies to fight alongside, as they will have to have a relatively low level of skill to be able to do well with you.
Working alongside, Kog'Maw players will likely observe an overall large increase in your team’s capacity to deal physical damage. Together, these champions can provide a great amount of sustained physical damage.
In contrast, by pairing Kog'Maw and Jarvan IV together, you probably will not be granting your other allies enough utility. Make sure to include other champions on your team that offsets this relative disparity in their capabilities.
Regardless of the ability of your Jarvan IV ally, you need to focus on increasing 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 Kog'Maw to synergize with Jarvan IV during both the laning and mid / late game phases of League rounds, you should keep reading to pick up some more tricks and insights into this champion pairing. If you pay attention to the build and stats shown above, you will grow your win rate by a lot.
The most crucial items to include in your Kog'Maw and Jarvan IV synergy build include Runaan's Hurricane, Guinsoo's Rageblade, and Blade of The Ruined King. When Kog'Maw bought at least these three items in his build, he performed significantly better when fighting alongside Jarvan IV than with many other commonly used item sets. In fact, Kog'Maw boasted an average winrate of 48.6% when playing alongside Jarvan IV with these items in his kit.
To have the best likelihood of vanquishing your oponents, Kog'Maw players should use the Lethal Tempo, Triumph, Legend: Bloodline, Last Stand, Conditioning, and Overgrowth runes from the Precision and Resolve rune sets. Of all the rune combinations players picked for this champion pairing, this combination of runes resulted in the top win rate. Moreover, these runes averaged a 48.6% winrate overall.
If you need to see Kog'Maw with Jarvan IV synergy tips and stats for a an individual division rank, feel free to choose one from the selection menu provided above. By default, the stats and tips and suggestions given are calculated using every game run with these champions.