The poor man's Sion support build.

If you're consistently getting team mates who cannot play the early game well this build is for you. It allows you to peel for your AD, and your entire team if you use the items correctly. This build comes in below 16k. First you take eye of the equinox. Then you buy a redemption. Redemption is great for the mid game and can allow you to make some great engagements and even save an ally in a close duel. Locket and knight's vow come next. Boots are situational but I take tabis most of the time so that I can take more damage. Stoneplate or randuins last. Randuins or thornmail if you didn't take tabis. If you did then zeke's conv may be considered.