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 on this page clarify several vital Briar vs. Irelia counter statistics that may help you explain the differences and similarities between this pair of champions. As an example, Briar’s KDA ratio ([kills + assists] / deaths) of NaN is more than Irelia’s KDA ratio of NaN, highlighting that Briar may be more central to their team's team fighting potential than Irelia..
Briar usually has a slightly larger longest kill spree than their matchup does. Commonly, they takes more damage than Irelia. This typically indicates differing health capacities, but it can also illustrate that the champion with higher health has less mobility and thus is not able to kite away from further damage when engaged or poked.
Both League champs are great. Both have their pros and cons. In League's current meta, Briar usually wins when trying to fight Irelia, with a 53.3% win rate. Thus, Briar makes a great counter for Irelia.
While Briar does have a higher win rate than Irelia, when facing one another, Briar also has a lower level of difficulty that makes them a less challenging champion to learn and master. You don't need to be too worried when picking Briar into Irelia.
Moreover, Briar has some amount of CC and other utility, a similar amount to Irelia. This often makes her just as valuable during team fights, especially when fighting champions with a ton of burst damage.
While there isn't one best champion overall in League of Legends, in Briar vs Irelia matchups, Briar is the better champ with a noticably higher win rate, less champion complexity, and a similar amount of utility to help out your teammates during late stage team fights.
Briar is a great counter to Irelia. You will do well by focussing your play on increasing your gold income and destroying objectives. If you are able to do that, you should do very well as Briar against Irelia.
To truly master Briar in order to counter Irelia during both the lane and mid / late game phases of League of Legends, you should continue reading to learn a few extra lessons on this matchup. If you mind the build and suggestions shown above, you will increase your win rate significantly and be closer to League of Legends pro players.
Briar on average racks up a lot less CS compared to Irelia. Champs who typically don't take much CS usualy don't need much CS to be valuable teammates, such as support champions. They are capable of scaling properly off of their skills, stats, and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often have to have a lot of items to be effective. In either situation, try to do better than the numbers reported on this page to do well.
The most crucial items to prioritize in your Briar versus Irelia build include Sterak's Gage, Titanic Hydra, and Sundered Sky. When Briar bought at least these three items in their build, they did a lot better vs Irelia than with many other common counter builds. In fact, Briar had an average winrate of 53.3% battling Irelia with this counter build.
To have the highest probability of vanquishing Irelia as Briar, you should equip the Hail of Blades, Sudden Impact, Eyeball Collection, Treasure Hunter, Magical Footwear, and Cosmic Insight runes from the Domination and Inspiration rune sets. Out of all the rune builds players used for Briar vs Irelia face-offs, this set of runes yielded the best win rate. Moreover, these runes provided a 53.3% win rate overall.
By default, tips, stats, and builds on how to beat Irelia as Briar are displayed for all skill levels, merged. To scope the stats and builds to a particular division, you should use the selection menu located earlier on the page.