Check for C.C. troops with an Archer and take them out with the rest of your Archers and a couple of Wizards.
Find a good spot to deploy your Giants and unleash them all, followed by a couple of Wall breakers to break in.
Deploy all your wizards in a line behind the Giants
Deploy all Valkyrie after Wizards in a smaller line around the area where the Giants broke in and your Barb King if you have him
Keep an eye on your Giants and use a Heal Spell when their health starts getting a little under half
Deploy rest of Archers if you have any
Once your troops get close to the Town Hall, drop your Rage Spell to help them take it out and any defenses around it
Use other Heal Spell on your Giants again when their health goes a little under half
(No execution notes)
You can use this strat to do some farming in Crystal while also getting some trophies at the same time. I can normally get 2 stars if not all 3 with this plus the resources and the loot bonus from your league.