Wizard has a delay/ Mortar has delay and the dangerous defense for wb's (tesla/ archertower and cannon) can be distracted.
You need 12 wb's from east as wallbreaker ignore the first spike if the spike is longer than 1 piece.
What I don't like about this layout is that you can get all collector/ mines without triggering any of your defense. To efficiently stop a goblin rush you need a lvl 6 wizard tower/ require high defense, doesn't make it a good layout per se.
I would clear your east side of all distractions, send in decoy barbs followed by wb's to breach your first wall. Mortar and Wizardtower can be timed/ distracted. Now I could either send Giants or Barbs, covered by Archers and timely another few wb's to breach the second/ third layer followed by a rage spell and goblin rush.
http://img138.imageshack.us/img138/6...ardianbase.jpg