just beat it!
I just beat Endor, after many many attempts. I used the strategy mentioned above to take 50% +1 of the command posts. I rushed to the closest Imp command post (or was it neutral at the start of the battle?). Took it and held it for dear life. Sure enough their reserves started to deplete.
It is a hard spot to hold, waves keep coming not to mention the AT-ST path is off to the side. Once we were even strength I knew I was going to win. I didn't blow up the bunker, just beat all the Imps.
btw I was a normal troop. Good luck, and if I can do it, so you can you.
"When kissed by the sword of Vengeance
Your head lays there by your side"
"Oh people, know that you have commited great sins. If you ask me what proof I have for these words, I say it is because I am the punishment of God. If you had not commited great sins, God would not have sent a punishment like me upon you!"
Genghis Khan, 1220