[Tanthallas]

Fighting on ledges does not exploit game mechanics that are not already a function of the general pathing issues in VP to begin with; i.e., the only issue with fighting on ledges is pathing, which is not a function of being on ledges but instead being in VP in general. Since the zone was made outdoor, there are zero chances to avoid the AE by being on ledges.

The only thing it allows you to SOMEWHAT avoid is training - I say somewhat because training on ledges is merely a matter of the training force being able to get someone up there as well.