Thanks for the excellent guide. I love going for dark elixir and agree with your strategy. I also had level 5 BK and level 2 minions at TH7. I am new to TH8 and have my BK to 6 and my minions to 3. My dragons are now level 3 as well. My most common army for this is 3 dragons, 50 archers, 25 minions, 20 barbarians and 20 goblins. I find this to be very effective. I agree that trophies need to be between 1500 and 1900. Above that and the bases become too difficult. I just recent passed 200k total DE stolen.
Here is a recent attack I did that landed over 4,000 dark elixir!


