Poppy support is really good in combination with a Vayne ADC, a Caitlyn ADC or any other ADC that can follow up your CC (E into a wall)

It's also fun to have an Anivia Mid, she can use her W (Crystallize) behind the enemy so you can stun the enemy into the Anivia wall.

When you're using this build you try to force your enemy's to stay close to walls so you can use your E (Heroic Charge) to stun them.

When you land a stun, follow it up with a Q (Hammer Shock) and when possible your R (Keeper's Verdict).

The build I whould normally go when my enemy champions are not bullying me:

The Righteous Glory is there to offer you a lot of engage options but also to offer you just a bit more mana and tankyness to survive when you pull off a hardengage.

The Knight's Vow offers your adc (or other team member) more survivability.

The Iceborn Gauntlet removes all mana problems. It also makes you even harder to kill and on top of that it offers a lot of slows and provides real good damage for a tank support. You might even be able to 1v1 some people after picking up this item.

The Gargoyle Stoneplate is for pure teamfights. When you see there are no teamfights in your game (really unlikely but still possible) Do not pick up this Item and go for more pressure in a sidelane or more skirmish potential.

The locket of the Iron solari is there to help your carry's against AP damage threats aswell as to offer you some more Magic resist.

When your team is snowballing I prefer to keep one inventory slot free for controlwards instead of the Locket.