Carefully look at the details of the enemy's base.
Look for where the Builder's Huts are placed. Don't worry about the Builder's Huts if they're with in the base. If nessasary, when the Builder's Huts are placed at the ends of the map, place 1 of your Wizards per Builder's Hut to get them out of the way.
Examine how the Enemy's Base's outer defences are positioned. Don't focus on the inner Base's defences yet. For one side, Place 2 of your Giants in front of the Enemy's Base. The goal here is to get the Enemy's Base's outer defences on that side to target your Giants. If defences are close together, try placing your Giants between those defences. Make sure on that your Giants on the same side are spread out so multiple of the Enemy's defences target your Giants, but all don't target the same Giant. Do this for 2 sides of the Enemy's Base that are close together.
After you place your Giants causing the outer defences to target your Giants, place and spread out 3 to 4 of your Wizards to attack the defences, while in cover on your Giants. Do this for the same 2 sides of the Enemy's Base.
Keep an eye on your Wizards health. If needed, drop 1 of your Healing Spells for your Wizards.
While Wizards and Giants attack the base, send a close grip of your Hog Riders to the defences in the core of the Enemy's Base. Try to get your Hog Riders to attack the Air Defences.
Drop 2 of your Healers to support the 2 largest groups of Wizards.
Repeat steps 3, 4, 5, and 7 to the other 2 sides of the Enemy's Base.
Monitor your troops health. Drop your Healing Spells on troops if they need it.