I can't think of any way, offhand. It's possible to turn Lorien into a through the use of hazards, but I guess improvement for Barad-dur is out of the question.
The game is flawed, but this does not mean it cannot be loved.
I find it funny that it works using Choking Shadows that will block the sight of a new moon.
That is like Frodo with Narsil+Anduril or Halbarad with the One Ring.