I personally feel that Sniper Rifle should be able to kill Nullifier through its bubble, this would give another method(instead of spamming bullets) to counter it for ranged players. I proposed it previously in some Sniper Rifle thread, so that Sniper Rifle would serve a role(taking out priority targets) in this mostly horde based fast-paced game which favor rapid killing with high firerate/attack speed or aoe dmg. Your high mastery locked items gave me an idea of crafting a mini death