Wolf wouldd let out a war cry and just stand around waiting for the alien to strike. When it does, Wolf would let it get the first hit and still dominate it easily. In fact Wolf is such a badass hunter he'd probably take no weapons and kill it with his bare hands, breaking t's neck so it doesn't bleed anywhere but even if it did wolf's pheremones are so strong they neutralize alien acid instantly so he's got nothing to worry about.