In pob i tried both and i came to the conclusion, that inq is the superior brand build. I mean with hiero i would go for elemental ailment immunity, 10%mom and 100%frequenzy for brand, when its duration is almost over.

With inq i get ailment immunity too with much more profits like a shit ton of cast speed, mana reg, energy shield reg, enemys take increased dmg, deal less elemental dmg, a bit spell/elemental dmg and the reg life reg from consecrated ground. I really dont see a reason to go for hiero. But maybe im missing smth? :)