I am undecided, but dude fix some things and I'll tip and use C2V

This guide here is really well written and coded, and i especially like the warding chapter. Bookmarked :)

I didn't say Clairvoyance isn't viable... I literally said it's "ugly" (which you can interpret however you want), but unlike you I actually spent the time to explain the reasoning behind my opinion.

I run 0 Defense masteries fully knowledgeable of its consequences...

I get the feeling you didn't even read this guide, so please keep your comments to yourself if they're not informative or constructive.

Thank you.

Well, masteries are completely wrong of course, magic pen on runes are wrong (useless outside of early game), and Clairvoyance under unviable summoner spells is also wrong. Running 0 defense on a tanky support is a mistake. You will feed before level 6.

Good job so far. You provide a good amount of information. And you are explaining the right information, like why you choose different items. Also the tips on the skills are really handy.

This build will defenitly teach people how to play Alistar

so +1 :D. keep up the good work