You can also augment giant/healer with a few (3-6) level 3 balloons on certain bases. Enter the giants to take out the AD and the balloons can pick off defenses on the outside once the giants get the aggro. This keeps the giants moving on the inside defenses. I also recommend 2 heal spells and 1 rage because once the giants die, its over.
Also upgrading the balloons to level 4 is recommended since balloon/minion is far stronger and there are less variables that can go wrong. This can get you through a CW until your dragons are up and running. It also helps when a dragon army is overkill.