Deploy your minions around the base or on outside buildings. This will attract Air Bombs to keep your balloons from being killed easily. Don't use up all off your Minions.
Deploy the remaining minions where you want to place your balloons (Like the Air Defenses) so they can cloud attacks before the balloons get to the defenses.
Put down your first healing potion near the minions and deploy your balloons on that spot. They will rush to defenses and bomb them.
Put down your second healing potions on where you put the first one, and deploy your dragons on that spot. Since your balloons will be bombing defenses and clouding the damage, your dragons can stay alive for a little longer.
Put down your Rage Potion on where the majority of the balloons are. If there are no more balloons, you can use them on the dragons.
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You can gain Three Stars if you find a good target, on average, this will earn you about Two Stars.