Everything is from Ashes of Malmouth. Using the new Witch Gods augments maybe you don’t need the miracle greens, though having them does still make it easier to overcap resists. For the chest, Mythical Vestments of Severed Faith is new in FG and is BiS for this build. And you don’t need the disrupt resist from the pants because of Possession, so you can swap in Demonbone instead. Ring of Basti is another piece to consider since it has useful skill bonuses, and two Voidhearts don’t increase RR more, you just need one.
https://www.grimtools.com/db/items/12445 - chest
https://www.grimtools.com/db/items/9178 - legs
https://www.grimtools.com/db/items/13820 - ring
Edit: The devo path has problems too because there’s no source of flat RR. This one is a newer build with no greens, but Scales of Ulcama got massive buffs in 1.1.5, there might be a better chaos devo path that includes it instead of Revenant. [1.1.3.0] AAR vs FoI (Deceiver, Mage Hunter, Purifier, Spellbinder, Warlock) (c+) (sr+) (g3)