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.
Pay attention to Ionian Fervor stacks and try to engage Irelia when it is down.
Minion waves greatly enhance Irelia's mobility, beware fighting her inside one.
Beware of wasting your high impact spells on Defiant Dance.
The stat comparisons provided here clarify some valuable Kog'Maw against Irelia matchup stats that can help us understand the distinctions between the two. As an example, Kog'Maw’s KDA ratio ([kills + assists] / deaths) of NaN is better than Irelia’s KDA ratio of NaN, highlighting that Kog'Maw may be more central to his team's team fighting effectiveness than Irelia..
Kog'Maw typically has a similar longest killing spree as his counter does. Commonly, he receives less damage than Irelia. This is usually reflective of different amounts of tankyness, but it can also show that the champ with higher HP has less mobility and thus is unable to flee from additional damage when engaged or poked.
Both League champs are great champions. Both champs have their strengths, weaknesses, and counters. In League's current meta, Kog'Maw usually loses when taking on Irelia, with a 48.2% win rate. Thus, Kog'Maw makes a bad counter for Irelia.
While Kog'Maw does have a lower winrate than Irelia, when facing one another, Kog'Maw also has a greater learning curve that makes him a more challenging champion to learn. You still need to be cautious when picking Kog'Maw into Irelia.
Furthermore, Kog'Maw has almost no amount of CC and other utility, a similar amount to Irelia. This makes her just as valuable during team fights, especially when fighting champions with a lot of burst damage.
While there is not a single best champion overall in League of Legends, in Kog'Maw vs Irelia matchups, Irelia is the better champion with a lower win rate, more champion depth, and a similar amount of utility to help out your allied champions during team fights.
Kog'Maw is a somewhat poor counter for Irelia. You will do well by focussing your strategy on increasing your gold and cs and destroying objectives. If you do that, you should do very well as Kog'Maw against Irelia.
To truly master Kog'Maw in order to counter Irelia during both the early game and mid / late game phases of League of Legends, you should keep reading to learn a few extra tips and tricks for this matchup. If you pay attention to the build and tips presented here, you will increase your win rate by a lot and be that much closer to League of Legends pro players.
Kog'Maw on average racks up a similar amount of CS compared to Irelia. Champions who on average don't acquire many minion kills usualy don't require much CS to be valuable teammates, such as support champions. They are able to scale properly off of their skills, stats, and first items alone. Yet, champions with large amounts of CS, such as hyper-carries, usually have to have a lot of items to be effective. In either case, try to exceed the values reported on this page to do well.
The best items to focus on in your Kog'Maw versus Irelia build consist of Runaan's Hurricane, Guinsoo's Rageblade, and Blade of The Ruined King. When Kog'Maw bought at least these three pieces in his build, he performed significantly better when fighting Irelia than with most other typical counter builds. In fact, Kog'Maw boasted an average winrate of 48.2% when playing against Irelia with this counter build.
To have the highest likelihood of coming out on top against Irelia as Kog'Maw, you 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 builds players used for Kog'Maw vs Irelia fights, this combination of runes yielded the highest win rate. Notably, these runes averaged a 48.2% winrate overall.
By default, tips, stats, and builds on how to beat Irelia as Kog'Maw are given for all skill levels combined. To scope the statistics and builds to a distinct skill level, you may use the selection menu above.