Notice here how the borders of the cc rest on this bases defenses? Now the enemy has 2 choices, attack without pulling the cc, or use hogs or loons to pull cc. The minimum amount of troops needed to pull the cc here is 15-20! Then they are going to have to kill the cc… that will probably take another 20 troops. The enemy has just used 35-40 troops on only killing the cc. Not to mention wasted time doing so. Advantage, your base.