The Fluffy Squishy - Pet Conjurer. It currently uses Mythical Blood Orb since it provides the same stats for a Conjurer except having Slow Res instead of Stun Res.
However, from the new items, Gate to many worlds can be used: https://www.grimtools.com/calc/d2jy03vN
Aether/Chaos, and/or Stun/Slow/Freeze/Trap res.
CC res is always useful. As for Aether & Chaos, Oak Skin provides Aether res if the build uses Shaman mastery but for Chaos, I think I am the only one who takes Possession on pet builds 
.