I like to be nice in reviews but...
I'm sorry. This game is just garbage. You say you need some luck but that is hardly fair. I've seen a single green take out about ten of my guys and I'm stuck with nothing left to defend. It's just completely pointless.
Fix it so the blue guys attack more often then maybe luck will play a part rather than be the overall decider of how well you will do because at the moment you need almost a million-to-one chance to survive for any decent amount of time.