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.
ok, this is how i play janna. she is a character that i play as a complete support. she is very, VERY team dependent when you play this build, so hope you have a good teammate. merc treads because she is squishy, you hit max cdr, so your all set there. you have a lot of mana regen so you do not even have to worry about mana, and even if you do run low, then you have clarity to help. clarity is used early game very much, since your teammates need those beneficial spells as much as possible. especially since eye of the storm is one of the more useful onees, though the howling gale is even more needed to either save someones ***, keep them there for the person to get to, or to assist with an escape. eye of the storm is nice for melee dps, but howling blast is still more important since you can make it so the opponents cannot escape those deadly dpsers. the boots are really up to you, its just that the CC reduction can be a life saver, especially if you find yourself getting targeted. archangels and zhonyas for the AP boost, because other than this, you dont get AP items, so it is important you get them. if you want, get them earlier. they can be amazingly helpful then too, though if the teammate is good enough, you will simply score the assist without the AP being needed. at any rate, GL and HF playing Janna, the storms fury!