[Rygar]

In CoM I saw an enchanter fighting on one side of the moat in Air Elemental form, if charm broke would float across moat, recharm. Mobs wouldn't jump across moat but path around it.

Now, this is how things should work in a real fantasy world, non-exploit. It was an advantage of levitate. But in a gaming world? Have to consult the guides. I think monsters are supposed to jump over / across obstacles to make up for their lack of better AI and help create more challenges for players and encourage grouping.