Rather amusing pissing contest...

Closing, as said not much can be done and what can would be too cpu intensive.

Unfortunately, nothing I can do about it. Part of the vanilla pathfinder -- see the same issue when trying to lead/tempt multiple cows/chickens/etc through a fence.

Even when I had a custom pathfinder, it was far to cpu-intensive to try and solve properly, and my 'solution' was to disable collisions between NPCs and let them 'stack' on eachother.

Will give it some thought, but not sure if I can can come up with any proper / workable solutions.