I've played support Anivia extensively, this is not how you do it.

Items need some work, but masteries and skill order are just plain bad. You should never take wall before E, much less maxing it before Q. You'll need RoA regardless of where you are, and you have the space and money for it considering you have GA and Zhonya's in the core section. Those're good defensive choices, but you really shouldn't be getting them every game. Also for the defensive section, stay away from Rylai's, and opt for Abyssal. Then, with Abyssal, Zhonya's, and GA, you have a solid section of defensive options. Most of the rest of what you said is true, but the things that you have wrong (or at least out of order) are significant enough to justify a down vote. Work on it some more, because it's a solid start, but as an Anivia main (and one also working on support Anivia), there are some glaring errors with this.

I did this too. It works great. I haven't tried out Will of the Ancients yet. Does the ult of Anivia leach life well? I always start with a Rod of Ages (sapphire crystal first item), so I can spam my Q and E more and use the ult on minions. I just wonder which adc would fit the best with this AP support. I think someone with a strong ult like and a slow like Jinx, so she can take the kill and get the money. Or maybe an Ashe with a maxed Q.

*runs off sobbing and locks self in toilet*

I'll be looking out for it! Thanks a bunch!
Now time to make MORE CHANGES *sob sob sob sob sob*

You have a lot of work to do indeed ^^

Luckily for you I am just about to finish my own anivia guide so you can learn from that ;-)

that was mean

Oh boy, you should've seen it before hehehe

And actually, I really don't think that it's just the cheatsheet I need to tweak. It's certainly a really weird build, and some of the stuff I have in here will be made redundant.
What's worse is that it's my first build guide, so I doubt it's just the cheatsheet I'll need to change ;(
Basically I need to know what the community likes/dislikes in general, and tone it as much as possible so that Support Anivia actually becomes viable kekeke

3 fingers and an eyeball? Sounds like a necrotising fasciitis victim. Ewww.

it's not a load of work....its doing the ******* cheatsheet right. Takes 3 seconds if you have at least 3 fingers and an eyeball. You say you made changes but the only correct thing I see on here is runes.

Oh and BTW it looks like Shard of Ice got renamed to Frost Queen's Claim.

Okey doke, but got a load of work to do :(

Same problem, really. Get MR glyphs and some different kind of marks (magic/hybrid pen preferably). Also, you should still level your spells a lot differently and rework the item build.

Sorry, posted that just a little too early. Oops.

Honestly it didn't get any better.

Anivia should max E first, as support you probably wanna max W second.
Regarding runes, you want hybrid pen, armor, magic resist and quints of choice. Masteries should be 0/9/21 indeed but should be specced differently.

Items: You want to get the spelltief's edge first, followed by tear, shard of ice, deathcap and seraphs.