You must have a town hall 7 or 8 base. This strategy is guaranteed to grant you 2 stars minimum. It is highly recommended to have a barbarian king, especially one that has its ability unlocked. This method can wreck havoc on a town hall 7 or 8 easily!
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Minimum Troop Housing Space Required: 200 Minimum Spell Housing Space Required: (not specified)
If all troops are level 4. the total cost for troops would be 117,000 elixir. If all troops are level 5, the total cost would be 142,000 elixir. Optional: Exchange a few wizards for more archers, wall breakers, etc. It all depends on your playing style ;)
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Deploy an archer near the Clan Castle to see if there are any troops inside. Lure them out and destroy them with your archers and possibly a wizard or two to remove large groups of archers and/or barbarians.
Quickly deploy 2 giants then 2 wall breakers. Send in 2 giants after your wall breakers, then send in two more wall breakers after your giants. Repeat until all of your wall breakers have been used up. Make sure to spawn wall breakers immediately after a mortar has shot its shell, for they can be killed by one shot easily.
Send in half of your wizards towards or near the direction the majority of the giants are headed to. Drop your rage spell (preferably on the region where most of your troops are huddled in so you can get the most out of your spell) and watch the magic happen.
Once you reach 40%+ damage, you might as well drop a heal spell on the area with the most giants and wizards.
Deploy a giant and two wizards every two seconds IN THAT ORDER. If you have any extra wizards, have them help out the remaining giants or just use them to destroy any remaining outer structures. Drop the final rage spell on the area with the most giants and wizards for intense carnage.
If you have a barbarian king, use it to destroy any exterior structures AFTER Step 3. If it is Level 5+, use it in Step 3 to absorb damage from defenses OR in Step 5 to remove the Town Hall and the other defenses. Make sure to use your hero's ability when it has reached about 50% of its health.
The base should be destroyed or nearly destroyed if this strategy was executed properly. Many people like using less wizards and more giants or archers. Others love using two heal spells and one rage spell rather than two rage and one heal. But this is the most balanced method. If you would like to modify this strategy, make sure not to use too many giants, because usually in the end you will have about 7-8 leftover that are doing nothing but smashing walls. Thanks for reading and I hope this was helpful!