Ok, this is really complicated and you're going to die a lot of times trying to pull it off. It'll prolly go away once riot changes the items. But what you do is play GP, and buy a wriggles. Then buy 5 tiamats. Then laugh hilariously at how 20% of the time that you can get the entire enemy team really centrally located to a minion, you can parrrley the minion and watch it proc the 425, but splash to the champions for 175% dmg. Which equals you doing around 750 splash dmg to everyone in the blast radius.
Basically you can ks your entire team with one shot.