INVASION game mode - Taunt item for Poppy?

After playing invasion about 7 times on PBE, I've noticed that there's no use of a tank because you can't ever make the enemy champions or mobs aggro you instead of your supports and carries. So you're stuck chasing and tickling down the mobs and champions that are chasing your allies. It's a pretty big bummer. I also noticed that poppy is beyond terrible for the round where Skarners come and ult you out of the circle, poppy is a sitting duck for almost that whole round, but that is another topic.

I think they should add in a tank item specifically for Invasion that lets you taunt a unit for X amount of seconds. Or perhaps one with a passive/active that makes an aura that has a % chance to taunt nearby enemies every few seconds. Just a thought since this is a raid-style mode.