Don't be too conservative with Mantra. Gathering Fire is strongest in teamfights, making it easy to recharge Mantra multiple times.
Gathering Fire rewards aggressive play. Look to land abilities and basic attacks on your opponent to lower Mantra's cooldown and stay on the offensive.
When using Focused Resolve, slow your opponents with Inner Flame or speed yourself up with Inspire if you're having trouble sticking to a target.
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 stat comparisons shown on this page highlight some critical Karma against Janna counter stats that can help us distinguish the differences and similarities between the two. For instance, Karma’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Janna’s ratio of NaN, showing that Karma may be more central to her team's team fighting effectiveness than Janna..
Karma normally has a slightly larger longest killing spree than her matchup does. Commonly, she receives a similar amount of damage to Janna. This commonly reflects different amounts of tankyness, yet it can also imply that the champion with higher health has less mobility and thus is unable to escape further damage when engaged or poked.
Both League champions are great. Both champs have their strengths, weaknesses, and counters. In League's current meta, Karma usually loses when trying to fight Janna, with a 48.5% win rate. Therefore, Karma makes a poor counter for Janna.
While Karma does have a lower winrate than Janna, when they face off with one another, Karma also has a lower learning curve that makes her a less challenging champion to learn and master. You still need to be cautious when picking Karma into Janna.
Additionally, Karma also has a good amount of utility and CC, a similar amount to Janna. This often makes her just as valuable during teamfights, especially when facing champions with a lot of burst damage.
While there isn't one best champion overall in League of Legends, in Karma vs Janna matchups, Janna is the better champ with a lower win rate, less champion complexity, and a similar amount of utility to help out your allied champions during team fights.
Karma is a somewhat poor counter for Janna. You will do well by focussing your play on maximizing your CS and clearing objectives. If you do that, you should hold your own as Karma against Janna.
If you would like to truly master Karma in order to counter Janna during both the early game and mid / late game phases of League of Legends, you should continue reading to learn a few extra tips and tricks for this matchup. If you listen to the build and suggestions presented above, you should grow your win rate significantly and be closer to League of Legends pro players.
Karma usually gets more CS as Janna. Champions who on average don't take many minion kills often don't require much CS to be effective, such as supports. These kinds of champions are capable of scaling well off of their abilities and first items alone. Yet, champs with large amounts of CS, such as hyper-carries, typically have to have a lot of items to be effective. In either situation, try to surpass the numbers reported here to do well.
The best items to prioritize in your Karma versus Janna build include Ardent Censer, Zaz'Zak's Realmspike, and Staff of Flowing Water. When Karma used at least these three pieces in her build, she did significantly better vs Janna than with many other typical builds. In fact, Karma boasted an average win rate of 48.5% battling Janna with this counter build.
To have the greatest probability of annihilating Janna as Karma, Karma players should use the Summon Aery, Manaflow Band, Transcendence, Scorch, Bone Plating, and Revitalize runes from the Sorcery and Resolve rune sets. Out of all the rune builds players chose for Karma vs Janna counter picks, this mix of runes resulted in the greatest win rate. Notably, these runes gave a 48.5% winrate overall.
By default, tips, statistics, and builds on how to beat Janna as Karma are displayed for every ranked division. To filter the statistics and builds to a specific skill level, you may use the selection menu located earlier on the page.