I was wondering if it was possible that a builder does't just have the same towers, but if it could be coded that the builder would receive a couple of towers randomly.
So if there were basic, normal and advanced towers:
A B C D E (Basic)
F G H I J (Normal)
K L M N O (Advanced)
He could get something like this as his "structures built":
B D E
F I J
K M O
So if there were basic, normal and advanced towers:
A B C D E (Basic)
F G H I J (Normal)
K L M N O (Advanced)
He could get something like this as his "structures built":
B D E
F I J
K M O