Why do people recommend to get bk at th8?
It's not any easier at th8 as the de drill is a reasonable 900 de a day if you collect it at max twice. That's nothing considering your de will be looted along the way. Don't rely on getting more de as a th8 than a th7 because it won't happen right away. I got my king to lvl 5 at th7 just by barching 1st or 2nd layer storages in gold 1. Not hard at all, so people need to stop thinking th7 is hard to get de at. The drill isn't your savior, it's just a small boost in your daily gain.