One suggestion is that you can only attack up to 1 class down, so Class A can attack ships and planets of Class B and A, B can attack C B A, and so on.
This would work if class were determined by total points.
__________________________ ''O importante é termos a capacidade de sacrificar aquilo que somos para nos tornamos naquilo que podemos ser."
Makes sense, would probably be easier to program too. How about it as a kind of upgrade in the secret techs screen where every coord costs, say, 20 creds per month?
__________________________ Where has the rum gone!?