I'm at T.H. 7. In war I use an all dragon attack. I usually don't get 100% when attacking T.H. 8 and was wondering what I can do to change that? In particular I was wondering about the spell use. I often drop 3 lightening spells on an air defense but sometimes maybe something can be done better? For example in the picture bellow would it be a good idea to use range when the dragons get close to all the air defense since they're close together, and rage works best to get through small tough areas?
With air defenses that close to each other, it is best to storm in
guns firing with dragons with rage spells. With the clan castle there, two rage spells can be placed for the dragons to quickly take out the air defenses and clan castle troops when attacking from the south of the base. Even with the air sweeper there, the speed boost could help with the recovery and help the dragons attack faster.
Of course, you could face some losses due to the combo of three air defenses... But rage spell should work best if the dragons start going towards center, where the air defenses are. Lightening spells are usually used against TH7 as they only have one air defense left and healing spells are usually used against inferior players/ a raid with lots of low health troops like BARCH.
Two of the air defences are together so you would have to use three lightning spells to take them both out. Then come from the top of the base using dragons. Do be wary of clan castle troops and I would take some archers. Due to the fact there is only one air defence it would be difficult to stop 8 or 9 dragons. Home this helps but you are lucky because two of the air defences are close together.
The base in the example is highly unlikely to be 3 starred in an all dragon attack by a th 7. It is certainly doable but not a gimme for attack by a th 8. I prefer to use lightnings as my drag attack spells to kill an ad (or 2 ads eventually). There are times though if the ads are close enough to the edges that rages can work well. I do not like healing spells for dragons.
More general advice for all dragon attacks:
Two leveled lightnings and a Quake can takeout an anti-air building. If you bring a Quake in the CC spell slot, you can take out 2 anti-air in the base with all 4 of your spells being lightning.
With clever use of your, queen, king and hogs in the CC donation, you can likely take out a third anti-air, leaving only one to pester your dragons.