Warmaster's Pack
Those unlock the weapon skins, so yes, they’ll count.
You can also get a Vigil weapon skin from one of the “Torn From The Sky” story achievements, too.
Thanks, but the “Torn From The Sky” story you can only do once per account right?
Right.
Before you go and spend days rolling new characters and getting them up to level 30 to do that story, you might want to consider practicing your jumping instead and doing Winter Wonderland. If you’re good at completing it, you’ll be able to earn over one gold each five minutes, and thus be able to get the whole 90-ish gold needed for the Vigil collection much more quickly than by running characters through the story.
You’ll need gold anyway in the end, as you need to buy all eighteen armour pieces as well as the nineteen weapons.