Mortick's Brace grants us all runes of Wrath of the Berserker.Echoing Fury provides us with a ludicrous 75% Attack Speed bonus even if its default Chance to Fear on Hit is very annoying with our high Attack Speed.Fury of the Ancients allowing us to have both great Fury generation from Ancients' Fury and 50% damage reduction from Together as One.Bracers of the First Men and Remorseless are the other core items granting us HotA damage and Attack Speed multipliers for crazy damage output.Cubing it allows us to use two 1-Handed Weapons for more Attack Speed and Critical Hit Damage.

The Gavel of Judgment for its huge separate damage multiplier and its Fury generation effect.Immortal King's Call (6 ) Bonus for the damage buff and cooldown reducing mechanics.Between the drops and the shards you’ll have all the Barb sets in short order (duplicate set items can be converted to another random piece from that set in the cube). Spend the shards targeting the armor spots you need. Get all your legendary gems, level the ones you are using as you go along. What I’d be doing is nephalem rifts to get greater rift keys (and mats) then greater rifts at a difficulty I won’t fail but that isn’t the easiest thing you can do.

These can also drop anywhere, be created from upgrading yellows in the cube (best choice for the weapon) or from spending blood shards at Kadala (best for the helm, chest, belt, pants, boots, gloves). This is the info page for the Immortal King’s helm, you can see links to the rest of the set items in the description. It is a 2 handed mighty weapon, you have a 1 in 8 chance of getting it from upgrading rare 2 handed mighty weapons in the cube. Not sure what is up with the linked description but it will take you to the info page for the Gavel.

Immortal king set build diablo 3