D/A Nine Tail Strike and the Avatar of Grenth

Question: How does Avatar of Grenth's enchantment stripping ability work with Dual Attacks by Assassins. Since the Avatar removes one enchantment with use of Attack skills, would it remove one enchantment or two with a Dual Attack, since technically when using that skill, you are striking twice??

Thanks for any information!!

You may be striking twice, but it's still one attack skill.

Why not grab a friend and test it out, probably way quicker than asking here and you'll be 100% certain that the answer is correct. For the record though, while I'm not sure about the Avatar of Grenth, I do know that Shattering Assault will remove 2 enchantments, 1 for each hit.