Suggestions?

[Tals]

I set my defense between 10 and 20, still new to this game and haven't quite got the hang of defense, it seems for a relatively low outlay you get a set number of defenders until they are routed.

Be interested in what others do though, Also was wondering about fortresses, whether you should set these up, but persumably they have to be spaced 2 squares apart from each other and care taken whether they will take the resources from an ajacent square?

Tals