Gwen can still damage enemies outside her Hallowed Mists, especially with her Ultimate's range.
Some of Gwen's Abilities can apply her passive to multiple enemies, so aim them at groups to get maximum damage and healing.
Always be Attacking - In addition to dealing bonus damage, Gwen's Attacks empower or reset many of her Abilities.
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 highlight some important Gwen versus Janna counter statistics that can help you appreciate the distinctions between these two champions. For instance, Gwen’s KDA ratio ([kills + assists] / deaths) of NaN is better than Janna’s KDA ratio of NaN, indicating that Gwen may be more central to her team's team fighting potential than Janna. This observation is largely fueled by the difference in kills.
Gwen often has a much larger longest kill spree than her counter does. On average, she takes more damage than Janna. This typically indicates different amounts of tankyness, but it can also show that the one champion has less agility and thus is unable to kite away from further harm when poked or engaged.
Both League champions are great champions. Both have their pros and cons. In the game's current meta, Gwen usually loses when taking on Janna, with a 47.7% win rate. Thus, Gwen makes a bad counter for Janna.
While Gwen does have a lower win rate than Janna, when they face off with one another, Gwen also has a lower level of difficulty that makes her a less difficult champ to learn. You should expect to face a difficult match when picking Gwen into Janna.
Additionally, Gwen has some amount of CC and other utility, a similar amount to Janna. This 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 in League of Legends, in Gwen vs Janna matchups, Janna is the better champion with a lower win rate, less champion complexity, and a similar amount of utility to help out your allied champions during teamfights.
Gwen is a bad counter to Janna. Make sure you focus your tactics on keeping up your CS and destroying objectives. If you are able to do that, you should do very well as Gwen against Janna.
If you would like to truly master Gwen in order to counter Janna during both the early game and mid / late game phases of League of Legends, you should continue reading to gather a few extra tips and tricks for this matchup. If you pay attention to the build and suggestions presented above, you should grow your win rate by a lot and be that much closer to League of Legends pro players.
Gwen most often racks up much more CS as Janna. Champions who on average don't get much CS typically don't have to have much CS to be valuable teammates, such as sup champs. They are able to scale well off of their abilities and first items alone. Yet, champs 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 shown on this page to do well.
The most crucial items to have in your Gwen versus Janna build consist of Rabadon's Deathcap, Nashor's Tooth, and Cosmic Drive. When Gwen used at least these three pieces in her build, she did a lot better when fighting Janna than with most other commonly used counter builds. In fact, Gwen boasted an average winrate of 47.7% when countering Janna with these items in her kit.
To have the highest probability of defeating Janna as Gwen, Gwen players should use the Conqueror, Presence of Mind, Legend: Alacrity, Last Stand, Second Wind, and Unflinching runes from the Precision and Resolve rune sets. Out of all the rune combinations players picked for Gwen vs Janna face-offs, this mix of runes resulted in the greatest win rate. In fact, these runes provided a 47.7% win rate overall.
By default, tips, statistics, and builds on how to beat Janna as Gwen are displayed for all skill levels combined. If you would like to scope the statistics and builds to a particular rank, you should use the selection menu located above.