TLDR: Infernal Aura should have the Minion: Damage over Time tag.
I’m using Cycle of Putrescence in Volatile Zombies. With the Repulsive Vomit node the +1 level to Damage over Time Minion skills is activated. This appears, currently, to be the ONLY instance that this +1 is usable.
Infernal Aura seems to also effectively add DoT to Golems making it a Damage over Time Minion skill and should gain the tag.