This strategy can be used by almost any TH8 player for war! To three star effectively with this attack, look for bases that are "open" or have little "compartments," allowing your P.E.K.K.As, Golems, and Skeletons to roam freely.
I use this attack strategy on my brother's TH8 account, and I have three starred with it successfully about 85% of the time! I suggest you give this a go, but practice this before using this attack strategy in war.
(No army intro)
Minimum Troop Housing Space Required: 200 Minimum Spell Housing Space Required: (not specified)
In your clan castle, bring two level 2 witches and one level 6+ barbarian. Your barbarian king should at least be level 5. Adjust the wall breaker amount if more walls need to be busted or are hard to reach. Adjust the giant amount or add hog riders to the composition if the enemy clan castle is out of reach. Change the amount of wizards when changing the amounts of the other troops, and always have 3 or more archers.
(No execution intro)
Lure the clan castle with the giant(s) or hog riders (if any).
Bring the enemy's clan castle troops to the location of the base where you will conduct your attack (normally somewhere closer to the town hall) using an archer. Once they arrive near the archer, drop your clan castle troops behind it. The barbarian and skeletons will distract the enemy clan castle troops, allowing the witches to survive. Drop a few wizards to finish the rest of the enemy clan castle troops.
While the defenses at the location where you will attack are being distracted, send the golems about 10 tiles away in that general direction to soak up damage from them. Fan out about 7 wizards to destroy the outside buildings behind the golems.
Send wall breakers to break the outer wall, then deploy the P.E.K.K.As and your barbarian king to go inside the base. The witches, golems, and wizards will follow.
Send all except 2 of the wizards inside the base. Drop a heal spell on the clustered troops when needed.
Send the remaining wall breakers to breach any inner walls protecting the core.
When the P.E.K.K.As and a few wizards are all clumped up, drop a rage spell on them to maximize damage dealt. Use the barbarian king's ability when it has about half of its hit points remaining.
Once most of the base is cleaned up, use the remaining archers and wizards to clean up any outside buildings out of reach.
Base should be completely destroyed. Congratulations!
(No execution notes)
I'll post a video later for those who don't quite understand how to execute the raid properly.