First Hardcore Inferno Belial Kill (by a Barbarian, too)

[Elric of Grans]

As others have said, Vortex is probably the easiest to deal with. Just about anything between you and them breaks the effect. There is plenty of terrain (or whatever) you can place between you and them while still firing over. If they still get you, use your defensive skill (Smoke Screen, Vault, Shadow Power) and get out of there --- Blizzard added them for a reason. Compared to Invulnerable Minions, Vortex is a doddle. I sure as heck would not want it removed, as it makes the game interesting.