I don't think the Zuni set is very good at the moment, however.

Now that I think about it, Deadly Rebirth and the Helltooth set aren't even necessary if you want to use Grasp of the Dead as a way to proc the Zuni set + proc Bane of the Trapped at the same time.Every other item, skill, and gem is flexible. All that's required is the Helltooth set (or Legacy of Nightmares, but I don't have enough ancients to properly test it), Deadly Rebirth, Wilken's Reach, and the Bane of the Trapped gem.D3planner was down when I checked, so use this if you can't see it: Because the corpse damage (and Wall of Death) stacks, we don't have to worry about mimics 'wasting' their attacks. My build focuses on Zombie Dog/Garg damage, and Grin Reaper clones spamming AOE spells.I've been having fun messing around with it! It's not as powerful as your standard Acid Cloud build, but it's more than capable of doing T10. The tweaked Rain of Corpses rune now deals its damage in 3 seconds AND more importantly the corpse damage stacks.

It's super easy to build - just use Kadala or the cube to roll rare mojos and ceremonial knives. Combined with the Deadly Rebirth knife (gain the Rain of Corpses rune on Grasp of the Dead) and the Unbreakable Grasp rune (no mana cost and 80% slow), we can now slow pretty much every enemy on screen, watch zombie corpses rain from the skies (even more so with Grin Reaper clones casting them too), and deal decent damage in the process. A new 2.4 mojo (Wilken's Reach) now allows Witch Doctors the ability to spam Grasp of the Dead with 0 cooldown.

D3 grasp of the dead