Get as much CDR as you can, wherever you can. Build focuses on spamming ignore pain, boosting dmg of allies, and crowd controlling monsters with cold/freeze mechanics. Cleave, Rend, and GoET gem boost the dps of party.
You can switch Cleave for Whirlwind Blood Funnel or Hurricane if you don't have enough CDR to spam Ignore Pain.
You can switch Relentless passive for Inspiring Presence so that your Threatening Shout lasts twice as long on enemies.
If you use WW instead of Cleave, you should use 2 piece set of Bul Krathos Oath instead of Eun Jang Do and Stormshield, drop Captain Crimson's Silk Girdle for String of Ears, and drop Illusory boots for Captain Crimson's Waders.