Does Witch Commander of Darkness and Scion Necro attack/cast speed buff stack?

I'm planning some duo shinanigans with a mate, and I can't seem to find any confirmation of whether the commander of darkness attack/cast speed aura from Witch Necromancer is the same/stacks with Scion Necromancer ascendancy.

My initial thought was that they didn't stack, but since they don't provide the same base buff I started doubting my initial gut reaction.

Can anyone confirm or deny so that I can get out of this googling hell :)

There's no interaction between them, so they work together just fine. Commander of Darkness only affects the Necro's auras, and Ascendant Necro only affects the Ascendant's auras. You just have to make sure you're both using different auras from each other when you're partied.

That is positively huge af. Cheers