Originally posted by SumatranRatMonkey:

It would help if mobs knew how to jump thin moats so it wasn't such a cheap tactic.

Blobs and oozers (and growths) might be able do that, or at least they can jump.

There are also flying mobs, introduced with ever-increasing intensity: Bats, drakes, deathsquitos, seekers, gjall. I wonder where we will go from here...