i`m relativly new still to DoF, but i have been playing the orcs mostly.
Currently im sitting on 65,000 storage, and i`ve still got a small ways to go to hit the new building cap. I could have maximised my storage for a larger storage capacity, but i went with what i thought was pleasing to the eye. Only built 50ish huts in startegic locations to harvest wood and remove trees from firing arcs of defensive seige. My city core is multiple (x2 - x5) t5 army buildings and tech with only 4 huts for esthetic reasons. Directly outside the walls is a layer of hutts and warg pens due to their low hieght and abilty to raise to t5 for max fire resists. After that, just went crazy with Guildhalls, even going so far as getting one ontop of a mountain. and i mean alot of guildhalls. they have 2ok health, and are a great source of spreading fires for the enemy to flee from or die. Not to mention if you take carefull note of the placement of spke trap locations you can turn some of those areas into a funnel zone that can force enemy units over those traps and since there between buildings, a blind attacking commander may not notice them. But they are expensive and building 30+ guildhalls is not for those who lack patience
Oh one note, a wilely cammander could use them for cover... but once its on fire... thats a diferent story.