Need a guide to train my troops

Hi I am town hall 7 i am attacking with mass dragons but I can't save my elixir so I need a idea to train troops with less elixir and get 3 stars at war ...
I hope that I will get a good idea to train troops

In war, mass drag with cc loons is the way to go. But for looting, 12 -16 giants, few wb, res barch, heal spell is more than enough. Just look for bases with full collectors or easily accessible storages.

I bring 25-30 archers, around a dozen wall breakers an the rest goblins.

If you are after loot, forget about trophies and league levels.

Snipe unprotected collectors with a single archer. 6-8 goblins will empty full collectors and mines unless they are extremely well protected.

Never use a full army. Take what you can get easily and quit.

Two lightning spells will mostly empty a full de drill. Look at the box on top of the drill to see how full it is. If your victim is one or two town hall levels above you and the drill is full, you can get tons of de this way.