The marilith doesn't make too many suggestions, and, mostly just wants the location to be back the way it is, now, enjoying the natural funnel the nearby terrain makes, making it difficult to assault the fortress from unusual angles, and wants that back, or something similar. The demons around the fortress are far more wary of the shadow stalkers, and only direct orders from the marilith get them to cooperate, mostly because they've been trained to watch out for intruders, exactly like the constructs.