I would switch Archangel's Staff and Rabadon's Deathcap. You won't have so much Mana in earlygame thats why I think Archangel is a bit useless. You have to be strong in earlygame and get some kills for Mejai's. Also I would start with Doran's Ring. If you get some kills in earlygame it's gg cuz youre Mejai boost is too strong.

hmm, okey; sometimes it's better ;)

any build with a stack item is already low in my book, and this has one and no explanation to back up such a risky item.

Shadow...this is a BUILD not "How to play Anivia". If you want strategies look for "Anivia Gameplay" on Youtube. I think this is a very good build and some interesting informations and combos. With this I'm going to play her.
+1 THUMPS UP

This is not a guide... this a build and bragging... As Shadow Palm said, you need to flush out your guide more. Add more information.

Talk more about actual strategies in game, don't just say that she owns.
With her large Aoe and easy skill shots she makes a very easy mid early game, but tell us how to play more, please.
-1