Immortal [Baruuk]:

Forma not really needed but I use 2 for more lazy mode.
2 madurai forma for max strenght. 3rd forma if you want to max [Vigilante Pursuit].

Multiplicative damage reduction. 90% from desolate hands, up to 40% from passive and 50% when activate Serene storm for up to 97% damage reduction. Adaptation does nothing on this Baruuk build.

Gladiator aegis because why not :-) [Vigilante Pursuit] (or [Enemy Sense]) for [Enemy Radar]. Duration is not needed since we don't use 1 and 2 is to dump energy to build up restraint faster. All energy you need is for desolate hands that you recast when dagger count goes below 9.

Might have to go afk to die.

Desolate hand daggers disarm enemies and build restrain. If you have more energy than you need to recast desolate hands dump it by using 2 when close to group of enemies to build restrain faster. Finding a heavy gunner can be a good source of restrain. Stay at range so you don't acidentally disarm her and press 1 when under fire. Restrain meter will fill up really fast. Don't forgot to deactivate your 1 else you run out of energy within seconds. Only thing that can kill you is by being permanently cc by ancients dragging you through toxic cloud while running out of daggers.

[Reactive Storm] makes serene storm absolutely insane. Status chance get multiplied with strength from frame so status chance will be close to 100% if you run no forma build or 144,8 with this build(one 60/60 elemental mod in [Desert Wind]). Impact damage of [Desert Wind] will be transformed so you'll never do impact but what the enemy is weak to. That means that primed heavy trama becomes best in slot since it don't increase impact damage but whatever enemy is weak to so can deal impact damage x 1.65 x 1.75 depending on enemy weakness. Magnetic vs corpus, corrosive vs grineer, blast vs machines and so on.

7 other serene storm mods: Viral + fire, crit damage/chance + [Primed Pressure Point] and [Corrupt Charge]. Viral + fire ain't needed since you got damage in abundance but since all impact get transformed there's nothing better to take. [Corrupt Charge] so you can activate heavy attack at will. Combo counter is pretty much irrelevant.

Active ult and you can deal several hundred thousand aoe damage frontal cone. Heavy attack can do million(s) and oneshot pretty much every mob in game.

Arcane, whatever you want. Arcane strike for + attack speed is quality of life.