Thanks to Janna's K/D/A and utility, she has a pretty good overall win rate. She does very well in the mid game, with a winrate of 51.45% in that phase. Unfortunately, she does poorest in the late game, where Janna's winrate is 50.2%., The difference between her best and worst game phases is only 1.3%. This small difference makes it clear that her relative power is uniform throughout the round.
In the current meta, Janna is very popular. She has been used in 5.3% of recently ranked rounds. She is rarely banned during champ select. Obviously, very few players see her as a major threat. In recent ranked matches, Janna was banned 1.5% of the time.
You can find her most often laning in the support position. The top win rate position for Janna is support (51,2%). At this time, Janna's meta game is centered around utility and support. In particular, her build should primarily be focused on assisting others. Furthermore, she is an ok magical damage dealer champion. Dealing physical damage is the least critical part of Janna’s kit.
You should anticipate having to dedicate a decent amount of time practicing and learning to get good at playing Janna. Many LoL players believe she is an average difficulty champ to main. Janna primarily deals magic damage (81% of her total damage). She doesn't deal a lot of other damage types and should not be considered a hybrid damage dealer..
Janna deals a small amount of damage during a normal game (7 400 damage). You probably shouldn't focus on building her as a powerful champ to smash your foes. Instead, you should dedicate yourself to helping your teammates to beat your enemy.
If you are looking for a dominating damage dealer, then you should definitely not consider this champion. She has one of the worst kill rates in the game among all champions. Moreover, she has a somewhat typical death rate with an average of 4.8 deaths per League game. Furthermore, Janna's KDA is usually very high with an average KDA ratio of 3.3 as well as 14.6 assists per round.
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