Not to mention Data's scanning. A phaser set to maximum could probably level or put a hole in those stone walls. And also keep in mind here would acid be coming from. Doubt they'd draw blood from phasers. It's not a projectile. More concussive than that. And I gave orf his blade to combat the Yautja. Didn't think he'd use it against the Xenos when he has 2 phasers at his disposal.