One of my favorite armies for farming is a configuration of the cheaper selection of troops. This will work for the Town Hall 7, 8, and maybe 9.
Troops:
- 6 wall breakers
- 12 giants
- 15 barbarians
- devide the rest of your unit space up evenly with archers and goblins
Spells:
- 2 rage
- 1 heal
Clan Castle:
- go for wizards or healer
I hope this helped, as I am new to this community please post comments on how I could improve or if you think this is a good army configuration!