Ha, then the only solution to your problem is to buy gems and then buy the resources.
90% of people with DE available are active players with tough bases. You're not getting both regularly in big numbers, either one or the other I'm afraid.
Just be patient and start collecting DE after a few weeks at TH8.






(for TH 7 that is). Those are the one you should aim for. If you can break in a TH 10 DE storage with normal farming army then go with it. If you can't use giant healer. 
