The latest versions of WoW have a new Key Binding called "Interact with Target" which, for a mob, is the same as using a Click-To-Move.



It does require your toons to have the target, but I assume that isn't a problem.



It's not much different than follow, e.g. if your mob moves to the left 5 yards, well, you're gonna have to tap a keybind again to face the mob.



Anything short of this borderlines automation, so you may find Jamba a useful solution.