Pathing here is super unclassic.

[DMN]

I think they had to make entirely their own code for pathing on P99. Original EQ had less problems with things falling through floors and walls and such, but virtually every zone had at least half a dozen exploit locations where you could get something to chase you and then you slightly move your location when it gets close and the mob chooses to run a much larger pathing loop to find you and then when it gets close to go back to the first spot and it loops back again. Basically it allowed you to kill any mob you wanted if you had ranged attacks wile they yo-yo'd back and forth.