Enemies hit on a 2.
Really? So I can just pick any random monster of a CR equal to my players' levels, and it's more than 50% likely to have an attack bonus of at least +19 over any of their ACs? Excepting, of course, PCs that optimize AC to the exclusion of just about everything else.
Huh, doesn't seem to be true for my Monster Manual. How about.... nope, not for MM 2 (3.5 updated), 3, 4, or 5. Not even the monster section in the EPH. In fact, none of the monsters seem to be capable of hitting on a 2 against any but the most unoptimized ACs.