This attack strategy is simply THE best you will ever see. Takes only around 23 mins and 30 secs training time. TH8 or TH7 players can use it if they have 200 housing space, so just go ahead and remove 10 archers and 10 goblins. I am a TH9 player, so i will show you this one for TH9. If you want to add spells, healing and rage spells should do it. Don't forget to use your heroes (Barbarian King and Archer Queen) if you have them! Take in your clan castle anything as long as it is full. If you have more than 220 housing space, add barbarians and goblins equally.
(No army intro)
Minimum Troop Housing Space Required: 220 Minimum Spell Housing Space Required: (not specified)
First of all, place some archers from where you want to start the attack to take out the barracks or whatever is surrounding the walls.
While the archers are working, place the giants along with 2 wallbreakers.
Once the defenses are distracted with the giants, place your heroes and deploy your clan castle troops near the giants so that they have the same target, and place wallbreakers to the walls surrounding the loot carrier (storages or collectors).
Now the defenses are too distracted, so at from the same point you started the attack, start deploying the archers, barbarians, and goblins. Don't deploy them all at the same time (don't hold your finger on your device), and don't deploy the same troop until they are 0. Place 3 troops at a time, like 3 barbarians, 3 archers, and 3 goblins, but try to make it fast.
Watch the destruction, this attack strategy sometimes gets 100%.
(No execution notes)
There you go, now your storages are full and you can now upgrade anything!