This is a good layout for farmers who are in the process of maxing out their Town Hall 4 Base in preparation for Town Hall 5. Pros: The Mortar reaches the whole outside of the base The Canons and Archer Towers are evenly distributed. Very Good symmetry Cons: Clan Castle is Easy to lure... Air Defense on Outside... Air Defenses at this level are not too important due to the lack of use of air troops under Town Hall 7.