Zeke's Harbinger will be a must-buy for AP supports after the rework

If it's one thing that AP supports really lacked, it's an AP-efficient item that also gives armor.

Well, Zeke's Harbinger does just that. And it gives mana, which is good, because supports tend to run very mana hungry.

Now, an AP support can buy sightstone + zeke's harbinger + mikhael's crucible + moba boots + gold item, and they will have everything that they need.