I'm th9 and i still use em for raids when i don't have much time to play (2 healers, about 15 giants, 4/8 wizards, barch, 8 wallbreakers, few minions... takes about 40 minutes).
At 1600- 1700 trophies i get great loots and often 3star maxed th8 and low-mid th9.
If you know how to use this strategy it works very fine, especially while farming.

