In that case I weren't talking about "them", unless you're claiming there are no cartoon monsters referenced anywhere in the discussion. It's called hyperbole.
Yes, biology is much more efficient than mechanics, at least as portrayed in this game. Wheels hooked up to an electric engine are also much more efficient than rocket engines, that doesn't mean any amount of them are going to get you into orbit. There's a difference between being efficient and being effective.
Also, it's actualy not as much that it isn't worth it as that there are more efficient ways to do the same thing.
But you DO have a point.
I'm kinda facepalming I didn't get this erlier, instead prematurely declaring things imposible. rather than trying to second guess evolution with convulted ideas I should have just looked at what things that eat armoured things do: Use frigging strong jaws to crush it, like a nutcracker. Lift it up and drop it from a great height. Mill through it with some rasping implement over a long period of time like starfish. Ok, new idea for a combat model:
FREAKJAW:
* Base: Minnion
* Freakishly large mouth, with teeth fused protruding as a sharp, monstrous beak.
* Extremely massive jaw muscles for slowly crushing through armor.
* stronger neck musculature to support the jaw
* tungue elongated like a tentacle, and with a venomous sting at the tip.
* Reversing some of the minnion adaptations and making generic combat enchantments instead, mainly increased strength and metabolism.
* Thick tangley "fur" of silk, like filt. should provide some manner of protection.
* claws on hands. Not huge big volverine claws, just the standard syle claws that most animals have. possibly retractable like a cats.
* porcupine style spines