Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Threats to Janna with this build
|Nunu||Janna does really well against a Nunu, just poke him down and you'll get a free kill as he got no CC (stun) abilities. His e does freeze you a little.|