Have all baby drags and zap spells and zap spell in cc, you shouldn't spend all your zap spells and bbdrags, that's why it's all one spell and one troop, the army won't mess up if you only deploy half of your troops.

3 lvl 7 zaps can take out a lvl 7 air defence or lower, 4 zaps need to be used for lvl 8+ airdefences. If you use a max lvl cc zap you can take out a lvl 8 or 9 air defences with only 3 zaps (one of which is the cc zap).

Only take out the air defences with zaps that really protect the loot, after that spread your baby drags around the base kind of surgically, so you use the least amount of baby drags possible, keep them separated so they are stronger, once you feel like you have gotten enough you can just end the attack