This guide is based on the data from http://current.lolalytics.com/champion/Ivern/Support/. As always, use your brain to figure out why things are the highest winrate. People that win build these items, but that doesn't mean the items are what makes them win.

Yes, you are taking smite on support. You will be down a combat summoner, but your gold and experience advantage over the other support should make up for that disadvantage. Also, you can set the enemy jungler behind at the same time as you get yourself ahead.

Without smite, Ivern almost doesn't have a passive at all.