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 provided here show some significant Rell versus Janna matchup stats that may help us grasp the differences between the two. As an example, Rell’s KDA ratio ([kills + assists] / deaths) of NaN is more than Janna’s KDA ratio of NaN, highlighting that Rell may be more central to her team's team fighting effectiveness than Janna..
Rell usually has a similar longest killing spree as her matchup does. On average, she takes more damage than Janna. This commonly reflects different amounts of tankyness; however, it can also imply that the champ with increased health has less mobility and thus is not able to escape additional harm when engaged or poked.
Both LoL champs are great. Both champs have their pros and cons. In League's current meta, Rell usually loses when taking on Janna, with a 45.3% win rate. Therefore, Rell makes a poor counter to Janna.
While Rell does have a much lower winrate compared to Janna, when facing one another, Rell also has a much lower learning curve that makes her a less complex character to learn. You should expect to face a difficult match when picking Rell into Janna.
Furthermore, Rell has a very large amount of utility and CC, a similar amount to Janna. This makes her just as valuable during teamfights, especially when fighting champions with a lot of burst damage.
While there isn't one best champion for every situation in League of Legends, in Rell vs Janna matchups, Janna is the better champion with a much lower win rate, less champion complexity, and a similar amount of utility to help out your allies during team fights.
Rell is a trash counter for Janna. You will do well by focussing your tactics on keeping up your CS and clearing objectives. If you do that, you should hold your own as Rell against Janna.
If you would like to truly master Rell in order to counter Janna during both the lane and mid / late game phases of League of Legends, you should keep reading to learn a few extra tricks and insights into this matchup. If you listen to the build and stats shown here, you should increase your win rate by a lot and be that much closer to League of Legends pro players.
Rell most often gets a similar amount of CS relative to Janna. Champions who typically don't get many minion kills often don't need much CS to be effective, such as supports. 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, typically require several high cost items to be effective. In either case, try to surpass the values reported here to do well.
The top items to use in your Rell versus Janna build consist of Trailblazer, Knight's Vow, and Solstice Sleigh. When Rell incorporated at least these three pieces in her build, she performed a lot better against Janna than with many other commonly used builds. In fact, Rell had an average winrate of 45.3% when countering Janna with this counter build.
To have the highest chance of annihilating Janna as Rell, Rell players should equip the Glacial Augment, Hextech Flashtraption, Biscuit Delivery, Cosmic Insight, Bone Plating, and Unflinching runes from the Inspiration and Resolve rune sets. Out of all the rune sets players picked for Rell vs Janna counterpicks, this blending of runes resulted in the best win rate. Moreover, these runes gave a 45.3% winrate overall.
If you would like to see Rell vs Janna tips and builds for a a particular division, please choose one from the selection menu provided above. By default, the statistics and build suggestions shown are computed using all rounds played with these champions.