I’d like to re-introduce Mythical Fiendmaster’s Raiment back to your list.
The bonuses to pets are great and the buffs in 1.0.6.0 to give secondary resistances to pets is a great call. The one thing holding it back? The skill bonuses are really bad. Like really, really bad. As this is primarily a Chaos pet item, I’ll discuss the 3 skills that benefit from this item:
+3 to Ground Slam: Pet builds focused on Summon Briarthorn are either taking Beastcaller’s Set or Ghol’s Set. If you’re playing a Chaos pet build, a pet Conjurer is one of the worst options you can use with it, as the items that provide -% Chaos Resistance are much better suited for pet Cabalists as nearly all of the items that give pet Chaos damage give Necromancer skill bonuses.
+2 to Manipulation: No need to touch this
+2 to Siphon Souls: lolwut? I can assure you that pet builds do not use Siphon Souls in any capacity
The unfortunate thing about Chaos pet builds is that the classes that can provide Chaos RR [Demolitionist and Inquisitor] can already do better pet builds as Fire or Lightning / Elemental, respectively. That means Chaos pet builds are in a bit of a pinch as to what skill bonuses to give them.
My recommendation is to switch the skill bonuses to:
+3 to Reap Spirit: I’ve already explained here as to why Reap Spirit can use the points: most of the equipment that gives +Reap Spirit points are either hard to get MI’s or convert Chaos damage to another type of damage.
+2 to Manipulation: No changes here
+3 to Death Sentence: If there were to be Chaos pet builds outside of Cabalist, I think Deceiver would be better than Demo as Demo is much more suited to Fire. In which case, I think Inquisitors in general need pet love, and they’d still be less of a meme option than pet Chaos Conjurers.