Conversely, the ability I like the most is the slow field. For me what happens as a DH with nether tentacles (which are slow moving to begin with) is they all bunch up in the slow field... so when an elite moves into the path of the bunch they get owned in a hilariously short amount of time. I killed a champion spider with a slow field in Act I Inferno that has almost a million health this way. I fired about 5 nether tentacles and the spider moved on top of them, I saw a shitload of big crits for a few seconds followed by an explosion of treasure.

Nothing should be able to cast offensive abilities while invulnerable.

Nothing.

Not even players.

reflect damage, invul, fire chains, nightmarish fast

Invulnerable Minions + Horde.

Suck. My. Dick. Bonus points for adding in Fast or Vortex.

This is LITERALLY the worst mixture anyone can be given:

Frozen Jailer Vortex Desecration

What's even worse is when that combo is on the guy that drop the meteors in Act 4. Jesus titty fucking Christ. It's TERRIBLE!

I know this has been said before, and probably by me in this thread, but I need to reiterate.  What the fuck does reflect damage exist.  Fucking why.  More than that, why did every single god damn elite mob I ran into in Act II have that trait?

Yesterday i had my run-in with a yellow dude with horde, arcane, fast, jailer, with his minions also inheriting jailer and arcane(they looked fast too i dont know if they had them). It was like being in a disco from hell. I died. A lot. Then i restarted the game. :D