[3.7] Cyclone CWC Blade Vortex Chieftain Build 1.3M DPS Tanky

Interesting build.
How does Malachai + Herald of Purity work exactly? With all the added fire dmg to spells wouldnt it apply EE +fire res and defeat the whole purpose?
Or does added spell dmg not apply to HoP minions and ghastly eye jewel is required for added cold/lightning dmg to minions for EE to work?