I don't like Zhonya's Hourglass when your that tanky. The active is wasted because you want the enemy team attacking you, not the people you are trying to support.

Having over 250 Ar/MR is overkill for 3000 HP. You should really consider a health item for your sixth slot. Giant's Belt into Warmog's Armor or Rylai's Crystal Scepter is viable choice, in my opinion, since your build is relativity cheap.

Also I find that since you have no dodge runes, the 2% dodge chance from Evasion is not really worth it. Why not take the extra MR and go for Strength of Spirit to give you a nice 17 extra hp/per5?

Your starting items are really good, keep you with enough mana to use your heal effectively. I personally go for
Faerie Charm + 3x sight ward into philosopher's stone
2x Faerie Charm + sight ward into Mana Manipulator + philosopher's stone
Mana Manipulator into Soul Shroud

thanks for feedback guys

Good build for ranked

Really like this guide, good all around explanations on how to play Alistar as a support and also good item build.

great guide, similar to the way I build support Alistar, very effective.

nice build and guide