Some kind of resource base?
At higher level, when buildings and walls start to get really expensive, it becomes hard to earn resources from collectors and the best way to get resources is by attacking, so i think there should be another ship unlocked at th 9 or 10 that takes you to a map with only resource bases, these bases produce a lot of resources but you need to defend it for others not to steal it from you, it will be a great way to produce more while not online and more challenging to defend it.
it should includes a new building, the th should be called outpost or something, the collectors and mines should be different design than the ones in your home bases, the resources produced will automatically be delivered to your village by a boat.
What do you think?
