The Spiral Sanctuary- A Town Hall 7 Farming Design
I've used it ever since I started Town Hall 7 and it has performed wonderfully. It hosts a wide range of features, including a centralised Clan Castle, well protected Gold/Dark Elixir storages and a triangle of Mortars.
Centralised Clan Castle
Clan castle is the highest DPS unit in the game, it is important you make it hard for your opponents to lure your troops by having your Clan Castle as central as possible.
Splash damage defenses are your best and biggest hope against swarms of archers/barbs/goblins that will try to steal your precious gold. Keep them in a triangle formation for the best splash coverage possible!
The whole point of your base is to defend your loot! If you separate your key storages (Gold & Dark Elixir) enemies can't just focus their attack on one specific area and steal all your gold.
Video (Its featured in there)