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.
Janna's at her strongest when buffing another ally. If you can harass her ally, it will weaken her ability to fight you.
Save an interrupt ability for when Janna uses her ultimate.
Listen for the charge up sound on Howling Gale in case Janna is trying to hit you with it from off screen or from brush.
The stats shown here emphasize some influential Kog'Maw against Janna matchup stats that can help you grasp the differences between the pair. As an example, Kog'Maw’s KDA ratio ([kills + assists] / deaths) of NaN is better than Janna’s KDA ratio of NaN, highlighting that Kog'Maw may be more central to his team's team fighting capacity than Janna. This observation is in large part fueled by the differences in killsdeaths.
Kog'Maw normally has a much larger longest kill spree than his matchup does. Typically, he receives more damage than Janna. This is usually reflective of different amounts of tankyness; however, it can also illustrate that the one champ has less agility and thus is unable to flee from further harm when poked or engaged.
Both LoL champs are great champions. Both champs have their strengths, weaknesses, and counters. In League's current meta, Kog'Maw usually loses when trying to fight Janna, with a 44.9% win rate. Therefore, Kog'Maw makes a poor counter for Janna.
While Kog'Maw does have a much lower win rate than Janna, when facing one another, Kog'Maw also has a lower learning curve that makes him a less challenging character to learn and master. You should be very concerned when picking Kog'Maw into Janna.
Moreover, Kog'Maw has almost no amount of CC and other utility, a similar amount to Janna. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there isn't a single best champion in League of Legends, in Kog'Maw vs Janna matchups, Janna is the better champ with a much lower win rate, less champion complexity, and a similar amount of utility to help out your allied champions during late stage team fights.
Kog'Maw is a trash counter for Janna. Focus your actions on increasing your CS and clearing objectives. If you can do that, you should hold your own as Kog'Maw against Janna.
If you would like to truly master Kog'Maw to counter Janna during both the laning and mid / late game phases of League of Legends, you should keep reading to gather a few extra lessons on this matchup. If you pay attention to the build and suggestions shown above, you will grow your win rate by a lot and be that much closer to League of Legends pro players.
Kog'Maw usually accumulates much more CS relative to Janna. Champions who typically don't earn many minion kills often don't need much CS to be valuable teammates, such as supports. They are able to scale well off of their abilities and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, typically have to have many items to be effective. In either situation, try to exceed the numbers reported on this page to do well.
The most crucial items to focus on in your Kog'Maw versus Janna build include Runaan's Hurricane, Guinsoo's Rageblade, and Terminus. When Kog'Maw combined at least these three items in his build, he performed much better against Janna than with most other typical counter builds. In fact, Kog'Maw boasted an average winrate of 44.9% when countering Janna with this counter build.
To have the highest likelihood of crushing Janna as Kog'Maw, you should take the Lethal Tempo, Triumph, Legend: Bloodline, Last Stand, Conditioning, and Overgrowth runes from the Precision and Resolve rune sets. Out of all the runes players chose for Kog'Maw vs Janna clashes, this set of runes resulted in the highest win rate. Moreover, these runes provided a 44.9% winrate overall.
By default, tips, statistics, and builds on how to beat Janna as Kog'Maw are given for all ranked divisions combined. To narrow the statistics and builds to a specific player tier, you can use the selection menu located above.