It also puts the army camps and collectors outside the walls, where they belong (DO NOT WASTE SPACE INSIDE YOUR WALLS PROTECTING BUILDINGS THAT HAVE NO CONSEQUENCE TO YOU FROM BEING DESTROYED!) and where they will also slow down incoming troops, so the canons, mortar and archers can hit them repeatedly before they ever reach the walls. It keeps what is probably the most vital defensive structure at this level (the mortar) well protected, and it arranges everything with overlapping fields of fire. There isn’t a TON that can be done with 75 wall pieces, this isn’t the ONLY layout that is good at th 4, but it is A good one. Ranges of TH level 4 defensive structures.
