[TH 7] Farming gold with dragons

[Methodical]

I have A LOT of elixir, and very little use for it right now. Gold on the other hand, I NEED A LOT. How would you recommend farming with dragons?

I don't feel dropping them all around the base would not work well. 

I thought about limiting it to dropping them in only 2 corners or maybe only one.

Discuss.