Establish Stability. Transfer responsability to Defender while keeping the offensive nature innate to being the Attacker. A Region starts with 100% Stability. This must be maintained by the players ( clans can adopt a region under their responsability using their meta gaming  ) via the normal mechanics of the game except being AFK or simply sailing about doing nothing. Stability drops, at a rate if the Region has no activity at all. Trade help keeping stability and raise