hi, um chris I think you need to up the polys in some areas of the buildings and lower them in others. You might also want to try making different shapes, the pentagonal prisms for pilars, instead of the boring cuboids. With some of the rings you've got there you can lower the polys by only giving it about 8 or 10 sides, remember you'll never see them that close, also you can get rid of polys that are underneath, as you only ever see the buildings and units from the top.