Ok, I just wanted to make sure you won't forget this. And I have another idea. What if you first build a standard tower, a watch tower, and then when you put an archer in it it's 'transformed' to a guard tower. And when you put more archers in it, it will shoot more arrows and do more damage. Then it could sometimes be wise to make 1 tower with 5 archers instead of 5 towers and no archers. Get what I mean?