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.
Janna's at her strongest when buffing another ally. If you can harass her ally, it will weaken her ability to fight you.
The stats shown here highlight several vital Rell against Janna matchup statistics that may help us explain the distinctions between these two champions. For instance, Rell’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Janna’s ratio of NaN, showing that Rell may be more central to her team's team fighting potential than Janna..
Rell often has a similar longest killing spree as her opponent does. Typically, she receives more damage than Janna. This often reflects different amounts of tankyness, but it can also hint that the one champion has less mobility and thus is not able to flee from further harm when poked or engaged.
Both LoL champs are great. Both have their pros and cons. In League's current meta, Rell usually loses when playing against Janna, with a 42.6% win rate. Therefore, Rell makes a bad counter for Janna.
While Rell does have a much lower win rate compared to Janna, when they face off with one another, Rell also has a much lower level of difficulty that makes her a less complex champ to pick up and master. You may get destroyed when picking Rell into Janna.
Moreover, Rell has a very large amount of utility and CC, a similar amount to Janna. This makes her just as valuable during team fights, especially when trying to counter champions with a lot of burst damage.
While there is not a single best champion overall 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 allied champions during late stage team fights.
Rell is a terribly counter to Janna. You will do well by focussing your actions on maximizing your gold and cs and destroying objectives. If you do that, you should be able to stand on your own as Rell against Janna.
If you would like to truly master Rell to counter Janna during both the early game 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 listen to the build and stats shown above, you will increase your win rate by a lot and be closer to League of Legends pro players.
Rell often accumulates more CS as Janna. Champs who on average don't earn much CS usualy don't have to have much CS to be effective, such as supports. These kinds of champions are able to scale properly off of their skills, stats, and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, often need many items to be effective. In either case, try to surpass the values reported on this page to do well.
The best items to have in your Rell versus Janna build include Evenshroud, Thornmail, and Bulwark of the Mountain. When Rell used at least these three items in her build, she performed significantly better vs Janna than with many other commonly used counter builds. In fact, Rell boasted an average winrate of 42.6% battling Janna with this counter build.
To have the highest likelihood of coming out on top against Janna as Rell, Rell players should use the Glacial Augment, Hextech Flashtraption, Minion Dematerializer, Cosmic Insight, Bone Plating, and Unflinching runes from the Inspiration and Resolve rune sets. Of all the rune sets players chose for Rell vs Janna counterpicks, this combination of runes yielded the best win rate. Notably, these runes averaged a 42.6% win rate overall.
If you would like to see Rell x Janna tips and builds for a a specific division rank, please choose one from the selection menu shown above. If viewing for the first time, the stats and guides shown are computed using all games finished with these champions.