Cityscapes rules for mobs are craptacular. Google around for oslecamo's rewrite on the minmax boards. Much better thought out and balanced. Make multiple mobs, rather than one big mob. Should be fairly straight forward.
That seems like a bad idea. I'm trying to throw a group of level 1's in and have them figure out how to get through a chaotic situation, not challenge a higher-level group. I'm also thinking less of the type of mob situation these seem to be designed for and more of a case of simple panic.
Hail to the Lord of Death and Destruction! CATNIP FOR THE CAT GOD! YARN FOR THE YARN THRONE! MILK FOR THE MILK BOWL!