This build manage to be very fast even with enemies at +20 levels. Copying this 1:1 might not result in the same outcome. You may need to adapt survivability and energy management according to your gear.

• 
  Glacial Shard

  stats

  • +3/6/9% Fire Resistance
  • +3/6/9% Cold Resistance

  completion bonus

  • +3 Health per Level

  
• 
  Glacial Shard

  stats

  • +3/6/9% Fire Resistance
  • +3/6/9% Cold Resistance

  completion bonus

  • +3 Health per Level

  
• 
  Turtle Shell

  stats

  • 2/4/6 Health per Level

  completion bonus

  • 4% increased Health

  
• 
  Rage of Ares

  stats

  • 20/40/60% increased Strike Damage
  • 20/40/60% increased Pierce Damage
  • +2/4/6% Critical Hit Chance
  • 15% less Armor

  completion bonus

  • Kill grants you and Summons 3% Speed for 10s (stacks 5x)

  
• 
  Centaur Hoof

  stats

  • 3/6/9% increased Movement Speed

  completion bonus

  • 10% increased Movement Skill Cooldown Rate

  
• 
  Hubris of Bellerophon

  stats

  • 10/20/30% increased Pierce Damage
  • 10/20/30% increased Bleeding Ailment Power
  • 7/14/21% increased Bleeding Ailment Duration

  completion bonus

  • +2 Maximum Bleeding Stacks
  • 10% increased Total Pierce Damage against Bleeding Enemies

  
• 
  Anvil of Hephaistos

  stats

  • 15/40/45% increased Area Damage
  • 4/8/12% increased Base Weapon Damage
  • -10% reduced Movement Speed (in-combat only)

  completion bonus

  • 10% Weapon Penetration

  

Check video. Basically everything is built to buff the damage and to give energy to your whirlwind. Doom horn and dodge buffs are needed only for bosses. Use them last in the rotation before pressing whirlwind to kill bosses