TH6: Best Farming Layout?

I need to upgrade all of my walls and was wondering what is the best or a really solid base layout for farming?

Not the best but I use this
http://i62.tinypic.com/i70suw.jpg

this is the best in my opinion, i used it when i was th6

sorry forgot to add it, here it is

http://clashofclansbuilder.com/plan/52768