your items don't really show any sign of support in anyway. You really need a gp5 item at least two imo. Most common picks on Janna are phliosopher's stone and Heart of Gold.

Also with Howling Gale you don't realyl need it any higher than level 1 until like level 13. You only need to use it to knock people up. Eye of the Storm and Zephyr provides you with more benefits. The shield gives more AD bonus and Zephyr can slow for a greater amoutn as well as deal more damage.

Janna shouldn't have too many mana problems unless there is something wrong between your laning partner or you are spamming too much spells. You have to use your skills wisely not spam at any moment you can. Thus Clarity isn't a good choice fo summoner spell on her. Either take Heal, Cleanse or Flash

also a good rule of thumb for lvl 1 Janna is don't get your first skill until you know what's happening until lvl 2. If you're just going to your lane and babysitting you AD carry, then E is always the better option to protect them from poking. If you think you might get into a fight with more than one ally on your side, grab Q first. Knocking the other team in the air is generally alot better than possibly saving one person with a shield and giving them a slight amount of AD.

The formatting of the guide is non-existant, not that it matters.

The content is lacking - There's not much information to be fair, no statistics and numbers, or whatever.

The builds are pretty bad - The 'full support' build has no gold per 10, which means you have no source of income to get all those expensive items AND wards. Same goes for the AP support.

The skill order is blargh... A rule of thumb is - For more damage, max Zephyr first, for more supporting, max Eye of the Storm first, NEVER max Howling Gale first.

As for masteries, don't bother getting a point in Scout - The range difference is so small, that it doesn't even help. Plus, with your build, you won't have much chance to place wards anyway.

Your runes are decent on the support page, but on the AP page, your glyphs are messed up.