Do you mean pathing while they are aggro on someone, or just normal pathing around while not aggro? If you mean normal non-aggro pathing, then to fix the pathing, you would just find any that have bad pathing, remove their pathing and add one in yourself manually that isn't broken. GeorgeS has a guide for how to do pathing on his site. Here it is:
http://wizardportal.dyndns.org/eqemu...ng_spawns.html