How to do a Dragonball in th8 !!!

first way
Troop Mix:
10 Dragons (any level)

Spells:
3 Lightning (level 4+ preferred)

Clan Castle Troops:
4-5 Balloons (level 6 preferred)

The strategy is very simple. Strike 3 Lightnings on the 1st Air Defense. Create a wall of Dragons near the 2nd Air Defense instantly followed by Balloons behind the wall of Dragons. For TH 8 bases, neglect the 3rd Air Defense as it will be destroyed easily together with the whole base.

Now here are the break down of details.

Identify the 1st, 2nd, and 3rd Air Defense. The 1st (and should be struck with Lightning) should meet any of the following criteria in this order:
1. Most center Air Def
2. Surrounded by high hp buildings such as Storage, Clan Castle, Town Hall, and Barbarian King (he's included since he's just like another building in an air raid and his hp is high)
3. Highest Air Def level

5. Beside tile spaces that can be suspicious of Air Bombs, Seeking Air Mines, and Hidden Teslas

The 2nd should be the other.
For TH8 bases, the 3rd is anything that is the total opposite of the 1st.

Now that you have identified, time to execute. No need to lure the defending Clan Castle troops. Strike 3 Lightning spells at the center of the 3x3 tile of the 1st Air Def you have chosen. How to do it properly? Highlight the Dragon on your troop menu. Zoom in at the Air Def while making sure your fingers are in the "red area". Do not highlight the Lightning spell while zooming in. This is to avoid accidentally miscasting the Lightning spell. After zooming in, highlight the Lightning then triple tap at the center of the 3x3 tile. Note: Lightning Level vs Air Def Level. Light 1 -> AD 3, Light 2 -> AD 5, Light 3 -> AD 6, Light 4+ -> all AD's