The problem with your design is this: There is no coverage from any other troop. It makes the walls useless.
You are better off putting cannons and archers towers next to your walls (not useing this design) and putting walled off barraks, gold mines and elexir collectors next to them. That will divert the wallbreakers from your defenses and save you the trouble of haveing to loose trophies over every attack. Because attacking with wallbreakers only blows up your walls, just attack with barbarians and be done with his base.

