LoL Janna players could find her to be a difficult champ to build out properly. You'll see that her build is modified when she is playing against either well-rounded or highly focused team compositions, demonstrating you should not follow the same Janna build every round of League of Legends
The best items to include in your champ's build are: Mondstein-Erneuerer, Befreiungsschlag, and Thymiaterion. Those who included these items in their kits had a greater winrate than players who worked towards other Janna builds. Likewise, if you are facing a well-mixed enemy team comp, you should really consider grabbing Janna the Inspiration, and Entschlossenheit runes. In recent games, she won the greatest fraction of her games when equipped with these runes.
We established our Janna build guidance by examining 55.213 recently ranked League games with her selected. We only propose the best winrate Janna builds that have been built by ranked players enough times for us to suggest them. With so many matches in our dataset, we are confident in our provided builds.