This tactic is especially used for winning against Town Hall 7 and up bases with 2 or 3 centred bases. This is effective and able to 3-star even a base with centred strong Air Defense. I ever 3-starred a TH 8 base in clan war, with this strategy
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Minimum Troop Housing Space Required: 200 Minimum Spell Housing Space Required: (not specified)
The first step of this strategy is trying to clean all Air Defenses that is vulnerable to the Wizards, Archers, and/or Clan CastleTroops you bring. Only use some of them, but make sure you destroyed the Air Defenses first. You can use all of them if there are 2 or more of the Air Defenses vulnerable.
Clear all buffers that blocks access to one of the remaining Air Defenses using the remaining Archers and Wizards, or also with 1 or 2 Dragons.
Deploy all Dragons on that side. Save your Healing Spell to enemy Clan Castle troops if it contains any Wizards or Dragon. Never use it when the Dragons are attacked by an Inferno Tower multi-target though. You can deploy a Rage Spell on the Dragon or Freeze Spell on that Inferno Tower if it's in single target mode because it is as powerful as Air Defense on Dragons.
Use Barbarian King and/or Archer Queen for sweeping the rest.
If Town Hall is outside you can sweep it using a Dragon or Barbarian King and/or Archer Queen. Or do it in early stage of time using a Dragon.
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You'll 2-star or 3-star most bases if done right as the Dragon will usually hit the center part and if the Town Hall is inside the Walls you can choose the side to be attacked so you'll hit the Town Hall. If the Town Hall is outside you'll sweep with Archer Queen or Barbarian King, or your Archers and Wizards, or a Dragon. You'll at least 1-star everything and would always almost 2-star everything. I'm sure of it. :)