Regarding HOJ+2 Dragon Holy Fire Paladin aura cast frequency

I know it’s been nerfed and I know these holy fire auras stuck up to lv44. but I am wondering does each of the 3 items cause a cast of the aura so it will cast 3 times as fast as normal holy fire from skill in a given period? Or does the frequency of the cast irrelevant to the number of holy fire aura gears? Thanks in advance.

I think it is just 1 aura dmg tick per same time, not 3, neither quicker. Better someone precise answer it tho.

And if someone answers, he could answer also my question of how works the interaction of HOJ+2 Dragon Holy fire + Paladin equiped its own Holy fire.
If it stacks together? (probably not)
If it has 2 separate ticks of aura dmg of its own?