This strategy is cheap, fast, only requires 2 Barracks (level 3 minimum) and is effective for multiple raids while maintaining a certain trophy count. It should preferably be done with 4 Barracks (TH7) and level 4 Troops, but those are not necessities.
(No army intro)
Minimum Troop Housing Space Required: (not specified) Minimum Spell Housing Space Required: (not specified)
You should aim to attack when your army size is over 80, regardless of composition (due to build times you should always have more Archers). Aim for bases with lots of resources (preferably over 100k), exposed collectors and lots of miscellaneous buildings on the outside.
If you still have not hit 50% I strongly suggest you end the battle.
(No execution notes)
If this is done correctly you should have gained a majority, if not all of the possible resources, while getting 1 star to keep yourself at your preferred farming level (me personally it is 1100-1300). Also, it should only be a short while before you can raid again, thereby reducing boredom and increasing total profit. If you're getting too high in Trophies, leave out attacking the miscellaneous buildings and you can drop back to your preferred level.