The stats on uniques are random, so here’s what you actually want to look for.
Willpower is a great stat. Attack speed is excellent. Demonology damage and Abyssal damage both work really well. Life, armor, and resistances are solid on defensive pieces.
If you’re running
Tyrael's Might, you can get away with fewer rolls of armor and magic resistance and still stay pretty tanky. I actually think it’s a decent item and I’m still debating whether it’s BiS or not.
For tempering, prioritize attack speed and Demonology damage. Critical strike chance and critical strike damage aren’t that important, though critical damage can still be useful.
If you’re playing the mythic version with
Heir of Perdition, that helmet gives you even more damage. Bonus Ball damage multiplier is also a great stat to have.
We are running the 5-set bonus for our Abyss skills — the Shadow Set. This gives us a massive increase to damage, and it also helps us keep Shadow Form up because
Sigil of Subversion becomes an auto-cast.
For our unique charm, I’m using the
Godslayer Crown. You can create it by combining three random unique charms into one, then crafting the
Godslayer Crown. Just make sure you have the Ancestral version of it.
Mythic
For the non-mythic version, you can instead use
Flickerstep as your talisman so you can replenish the cooldown of your ultimate.