[Module] Big Bang | Adventurer skills

Is the Sniper's Blizzard capable of dealing critical damage? Would it be worth grabbing as an attacking skill either way?

I'm trying to do a build for my Marksman and I'm stuck on whether to do 16 Blizz/10 Thrust or 20 Blizz/6 Thrust.

Yes, Blizzard does critical damage. You should max it.