http://m.imgur.com/hR62ihc
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Your compartments are longer than needed, if you make the compartments around the defences smaller you should hopefully get enough walls to get all your storages inside and possibly the AD. Also you can put more than one building in the same compartment to save walls, but don't out everything in one huge ring! Hope this helps :)
Just go to TH7. Don't let the chumps on the forums convince you 'max everything before the next town hall level'. That is general advice that should not be taken as law.
Get to TH7 as soon as you level up your offense for TH5 and 6. You will not regret it. The game really doesn't get serious until TH7.
You should be farming and not looking for trophies. Move the town hall outside of your walls and into a corner of your base. Any corner will do.