Kassadin's ultimate has many uses and is on a shorter cooldown than most, use it often.
Kassadin has multiple item paths; he can go caster via Mana and Ability Power or anti-caster with Cooldown Reduction and Magic Resist.
Try to get the Ancient Golem buff to counteract Riftwalk's increasing Mana cost.
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 shown here show several strategic Kassadin versus Irelia matchup statistics that may help you appreciate the distinctions between the two. As an example, Kassadin’s KDA ratio ([kills + assists] / deaths) of NaN is better than Irelia’s ratio of NaN, indicating that Kassadin may be more central to his team's team fighting potential than Irelia..
Kassadin usually has a similar longest kill spree as his matchup does. Typically, he takes a similar amount of damage to Irelia. This typically indicates differing health capacities, yet it can also show that the champion with more HP has less agility and thus is not able to flee from additional harm when poked or engaged.
Both LoL champions are great. Both have their pros and cons. In League's current meta, Kassadin usually fairs equally well when facing off against Irelia, with a 49.3% win rate. As a result, Kassadin makes an ok counter to Irelia.
While Kassadin does have a lower win rate than Irelia, when facing one another, Kassadin also has a much greater difficulty level that makes him a more difficult champ to learn. You still need to be cautious when picking Kassadin into Ireliaas his relative depth means that you may not be able to reach his full potential without a lot of practice beforehand.
Moreover, Kassadin has some amount of utility and CC, a similar amount to Irelia. This often makes her just as valuable during team fights, especially when facing champions with a ton of burst damage.
While there is not a single best champion overall in League of Legends, in Kassadin vs Irelia matchups, Irelia is the better champ with a similar win rate, more champion depth, and a similar amount of utility to help out your allied champions during team fights.
Kassadin is a somewhat poor counter to Irelia. Focus your gameplay on maximizing your gold income and clearing objectives. If you do that, you should be able to stand on your own as Kassadin against Irelia.
To truly master Kassadin to counter Irelia during both the laning and mid / late game phases of League of Legends, you should keep reading to pick up a few extra tricks and insights into this matchup. If you mind the build and stats shown above, you will grow your win rate by a lot and be that much closer to League of Legends pro players.
Kassadin on average racks up a similar amount of CS relative to Irelia. Champions who on average don't get many minion kills typically don't need much CS to be valuable teammates, such as support champions. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, typically have to have many items to be effective. In either case, try to exceed the numbers reported on this page to do well.
The ideal items to use in your Kassadin versus Irelia build consist of Rabadon's Deathcap, Malignance, and Rod of Ages. When Kassadin bought at least these three items in his build, he did much better vs Irelia than with many other typical item sets. In fact, Kassadin had an average win rate of 49.3% when countering Irelia with these items in his kit.
To have the highest likelihood of crushing Irelia as Kassadin, Kassadin players should use the First Strike, Magical Footwear, Future's Market, Cosmic Insight, Sudden Impact, and Ultimate Hunter runes from the Inspiration and Domination rune sets. Of all the rune builds players picked for Kassadin vs Irelia battles, this combo of runes yielded the greatest win rate. Moreover, these runes gave a 49.3% winrate overall.
By default, tips, statistics, and builds on how to beat Irelia as Kassadin are displayed for all ranked divisions. If you want to scope the stats and builds to a particular rank, you can use the selection menu earlier on the page.