Barching
Yep I definitely recommend using two barracks dedicated to archers and barbs. Its a fast and efficient method for reaping the rewards.
But don't attack just any old base, attack bases that show you they have a decent amount of resources e.g: 200k of each and 1k DE. But you don't want to be trying to three star or get the loot in the storages so you need to make sure the loot is in the collectors on the outside / edges of the base. I will only attack if I can see at least 1/4 of the storage is full.
See how the elixir is visually raised?
And remember that if their collectors are full but the over all loot is low, its probably because of the Town Hall loot penalty (The base is a lower TH than yours so you get less loot).
This site could help (I found the image there): http://cocland.com/tricks-and-tips/farming-collectors-tips