Don't go in first to a large teamfight. Wait for your teammates to initiate.
Tumble has many uses, but it cannot pass over walls.
Condemn can be used to both pin targets to walls to ensure a kill, or to escape a pursuer.
The stat comparisons provided here show several important Vayne versus Briar counter statistics that may help you distinguish the differences and similarities between the two. Vayne’s KDA ratio ([kills + assists] / deaths) of NaN is more than Briar’s KDA ratio of NaN, indicating that Vayne may be more central to her team's team fighting capacity than Briar..
Vayne normally has a similar longest kill spree as her foe does. On average, she receives less damage than Briar. This commonly reflects differing health capacities, but it can also illustrate that the one champion has less mobility and thus is unable to escape further damage when poked or engaged.
Both League of Legends champs are great champions. Both have their pros and cons. In the game's current meta, Vayne usually loses when trying to fight Briar, with a 48.6% win rate. Therefore, Vayne makes a poor counter to Briar.
While Vayne does have a lower win rate than Briar, when facing one another, Vayne also has a much greater difficulty level that makes her a more difficult champion to pick up and master. You should be careful when picking Vayne into Briaras her relative depth means you may not be able to reach her full potential without a lot of practice beforehand.
Moreover, Vayne has some amount of CC and other utility, a similar amount to Briar. This often makes her just as valuable during team fights, especially when facing champions with a lot of burst damage.
While there isn't one best champion in League of Legends, in Vayne vs Briar matchups, Briar is the better champ with a lower win rate, more champion depth, and a similar amount of utility to help out your allied champions during teamfights.
Vayne is a somewhat poor counter to Briar. You will do well by focussing your tactics on maximizing your CS and destroying objectives. If you can do that, you should do very well as Vayne against Briar.
If you would like to learn all of the intricacies of Vayne to counter Briar during both the laning and mid / late game phases of League of Legends, you should keep reading to pick up a few extra lessons on this matchup. If you listen to the build and stats shown above, you will increase your win rate significantly and be closer to League of Legends pro players.
Vayne usually racks up much more CS relative to Briar. Champions who typically don't take much CS typically don't require much CS to be effective, such as support champions. They are capable of scaling properly off of their skills, stats, and first items alone. Yet, champs with a lot of CS, such as hyper-carries, usually require several high cost items to be effective. In either case, try to do better than the numbers shown here to do well.
The most important items to prioritize in your Vayne versus Briar build include Wit's End, Guinsoo's Rageblade, and Terminus. When Vayne bought at least these three items in her build, she performed significantly better versus Briar than with many other commonly used builds. In fact, Vayne had an average winrate of 48.6% battling Briar with these items in her kit.
To have the greatest chance of beating Briar as Vayne, you should take the Fleet Footwork, Triumph, Legend: Alacrity, Coup de Grace, Conditioning, and Overgrowth runes from the Precision and Resolve rune sets. Out of all the rune sets players chose for Vayne vs Briar fights, this order of runes yielded the best win rate. Moreover, these runes averaged a 48.6% win rate overall.
If you would like to see Vayne versus Briar tips and matchup stats and build suggestions for a an individual rank, please select one from the selection menu above. By default, the stats and build suggestions displayed are calculated using every round run with both champs.