@Sushiman, that map is indeed very mean, but entirely possible. I found room to gather 11 energy on the surface, which gave me enough time to clear out the upper layer of creeper, and to build more reactors needed to fully supply my dark beam. From there on, it is straightforward. See attachment.
EDIT: Thank you for posting it, I liked the challenge. Also, It took a great deal of micromanagement (N key).