Diablo 4 S15 Ultimate Immortal Whirlwind (Tower136+)

This is my Endgame Immortal Speed Whirlwind Barbarian build that Trillions of damage while being practically unkillable and extremely fast making it great for all content and farming purposes. With this setup we stack Tons of Fury and resource generation because we use the Melted Heart of Selig amulet which makes it to where we take damage from our primary resource before our life pool and it is drastically reduced. That being said we DO NOT WANT ANY EXTRA LIFE ANYWHERE (gear/charms/paragon etc, etc.) we actually aim for the lowest amount of life possible because the damage we take is based on how much life we have overall so the lower our life the smaller damage hits we take so this is very important. Also we use Ramaladni's Magnum Opus gaining a huge chunk of damage based on how much primary resource we have. Currently with this setup I have around 700+ fury making it very tanky and deal a lot of damage.

How this build works is pretty much how it plays above, we just want to hold down Whirlwind so that we are spinning all around killing enemies and winning. Be sure to use Rallying Cry often to keep the buff up that we receive from it (try to time it and not use it more then needed because it does cost resource. Cast all of skills/shouts when they are off cooldown for buffs BUT save your Wrath of the Berserker Ultimate skill for harder enemies/bosses for a nice damage increase while it is active, then just Rinse and Repeat it is a very simple brainless playstyle which I love.