[@MelonHead]

You are missing the point. The metal plating is 100mm, not the glass, and even if the metal doesn't dent the shock can transfer to the lens. The force of the blow doesn't just magically dissipate, Newton's law and all. The rock does not need to hit the lens directly to fuck it up. 

It's nice that you can decide if and when it is convenient to take damage depending on the circumstances, but I'd scarcely encourage adding that on top of how Higan also boasts the favor of the Lucky Guess Goddesses. With all its strength and while holding the hardest naturally found object for many miles around, Slimy failed to trouble even the weakest spot on his opponent. A little fuzziness and black patches very conveniently appearing over the side that Slimy isn't on is scarcely an inconvenience, especially when Higan can make up for the slight loss in sight by just turning. Why does turning matter if Shash is on his body? Slimy can't get down without being shot, and is now without a way to inflict any damage unless he can get away.

I know I asked for this match, and having Slimy run, hide, and breed was the initial plan, and it is to be expected that it would be one-sided given the circumstances. Invincible armor isn't too big of a deal I suppose, and neither is having the guy inside be unusually good at guessing hiding spots. The instances of Lady Luck kissing his fanny are just a bit too much though.