This PoE 3.14 Ultimatum Mauarder General's Cry Blade Flurry Berserker is a great boss killer build. Blade Flurry with general's cry deals stupid amount of damage. 

General's Cry is a warcry skill that taunts nearby enemies, and summons a number of mirage warriors from nearby corpses based on the power of nearby enemies and corpses. Mirage warriors deliver an exerted attack once with the linked trigger skill then disappear.

This build use cyclone - cwc - desecrate setup to create corpses so we can summon mirage warriors all the time.

 

Skill Tree

Ascendancy: War Bringer - Flawless Savagery - Blitz - Aspect of Carnage

Pantheon: Lunaris and Shakari

Bandit: Kill all

Passive Tree & PoB

Path of Building Link: https://pastebin.com/ddGrTZHy

 

Gems Setup

Blade Flurry - General's Cry - Brutality - Pulverise - Impale - Melee Physical Damage

Blood and Sand - Pride - Flesh and Stone (Divergent) - Enlighten

Dash (Divergent) - Second Wind - Berserk / Vaal Ancestral Warchief

Cyclone (Divergent) - Cast while Channelling - Infused Channelling (Anomalous) - Desecrate

Blood Rage / Precision (Lvl 1) - Dread Banner

Vaal Molten Shell / Cast when Damage Taken / Summon Stone Golem

 

Gear Setup Sample

Paradoxica, Redblade Banner, Abyssus with enhance "General's Cry has +1 to maximum number of Mirage Warriors"

We need find some dex and int on rare items!

Body Armour

+12% to all Elemental Resistances
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10% increased Dexterity
+48 to Armour
15% increased Energy Shield Recovery rate
+33 to maximum Life
Attacks have +1.5% to Critical Strike Chance
Enemies you Kill Explode, dealing 3% of their Life as Physical Damage
+84 to maximum Life

Good mod for us: attack critical strike chance, explode, life, inc dex

Ring

Curse Enemies with Vulnerability on Hit, with 20% increased Effect
+573 to Accuracy Rating
+60 to maximum Life
Regenerate 3.7 Life per second
+30% to Fire Resistance
Non-Channelling Skills have -9 to Total Mana Cost

Good mod for us: non-channelling skills mana cost, res

You can find Vulnerability curse on other gear.

Amulet

Allocates Fatal Blade
+28 to Dexterity and Intelligence
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+37 to Dexterity
+34% to Global Critical Strike Multiplier
10% increased Evasion Rating
+82 to maximum Life
+36% to Fire Resistance
Channelling Skills have -3 to Total Mana Cost

Good mod for us: non-channelling skills mana cost, res, dex and int, life, critical strike multiplier

Boot

+12% to Fire and Cold Resistances
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Socketed Gems are Supported by Level 20 Fortify
+17 to Dexterity
+39% to Lightning Resistance
Can have up to 3 Crafted Modifiers
+65 to maximum Life
23% increased Movement Speed

Put Cyclone (Divergent) 4L on Fortify boots

Flask

Find Immunity to Freeze and Chill mod on any flask. Diamond Flask for luck critical strike. Cinderswallow Urn and Lion's Roar