Hopefully they earned it within the 4 months since they posted this.
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If you're TH7, use 3 lv 4 lightnings on 1k+ targets
I usally go around 1300 and if a high level attacks me i Revenge with 3 Lightning spells and easy 500-1000 DE for me :P
Farm down to 680-720 put your dark elixir storage in the middle of your village (it works really well)now i'm in Waitrose RULE Also i'm Kai The Great!:) :)