If you want, you can get rid of a few balloons and add a healer and/or a few wall breakers.
Find a base to attack.
Put down a goblin or giant to test for CC troops. If there are weak troops, use the lightning spell to destroy them. If not, use balloons or surrender.
Next, unleash the giants! Put them down to destroy air defenses, wizard towers, and archer towers. If you trained a healer, use it now.If there are defenses left, drop 7-9 balloons to get rid of them. If needed, drop a healing spell right before or after you drop the balloons.
Using 4-5 at a time, drop balloons to destroy the defenses.
After the defenses are destroyed, drop the goblins to finish it off, and gather loot. Use the wall breakers (if you trained some up) to clear a path.