Do u want advice?? take this
I'm myself a Th7 and i have my BK going to lvl 5 in 2 and half weeks of my TH7 lifetime .. its very easy
1) push ur cups to 1500-1600 range so u can have good gold and Elixir loot as well as DE
2) Look for exposed storage and Drills of TH9s and 10s , i got a lot of 2k+ de raid from maxed drills
3) Don't be afraid to loose a battle to get precious De , Hit d exposed Th to maintain trophy
4) Believe me , Zapping ain't recommended unless u hit a full storage,i would rather use two lightning to take out a mortar which protects d De storage and hit d storage directly . So I save a spell here and get more DE
5) Try to avoid sniping maxed TH8s( those who are very active with maxed skulls) to lower d chances of getting revenged and Never zap their storage
Army:
1)Normal Barch army for storages inside two layer of wall and exposed drills
2) Giant- Healer for storages behind 3 layer of walls
Spells :
Carry two lightning and one heal
Lightning to take out one mortar and heal to heal ur barbs when under splash damage
good luck !