It is not always possible to strike back with "ss" or "ps" ... Yes, and development can be long-term, when the real profit will be after a while, and early, like the indie communist.
A communist in the first phase of development, can make a seizure and answer him with the same coin, it is sometimes impossible. Therefore, the formula 1 cc ps = 1 cc ps, I think is not correct.
The answer must always be tough. Even when several countries attack me, I leave no one unanswered. And I always start with those who can get into the top 10.