Diablo III: Reaper of Souls

Hmm. Double immunity, or Obsidian for perma-WotB?

I mean, permba-WotB grants a permanent damage and snare immunity. But double immunity can trivialize elites/RGs and more than make up for the lack of damage decrease by reducing the need to even avoid attacks. (Depending on RG.)

Also, I'll need a good immunity amulet. I had all but Fire. Extracted them all anticipating that I'll be using the Star once I can find one. Arcane/Fire or Fire/Poison sound like good combinations.