Request Clan castle troops. With 25 space, request 3 Valks and an archer. With 20 space, request 2 Valks and a wizard.
Lure out the enemy Clan Castle with the dragons. Usually, they will not be able to stand up to 2 dragons, but if they do, use as few wizards as possible to finish them off.
Look for a place where there are lots of archer towers and cannons. As most of your troops have high defense, splash damage defenses aren't as important. Note: at the same level,archer towers deal more damage than cannons, so they are your priority. other note: You are using valks, look for places where defenses are clumped.
Drop 1 PEKKA and your king, followed quickly by the valks and then clan castle, which you should spread out a little.
Rage them up, drop the wall breakers. Make sure to drop these soon after the PEKKA and Barbarian King so they don't go around the outside of the base.
Once a few defenses have been taken out, follow up with the rest of the wizards and the second PEKKA.
When they close in on the center, drop the seconds rage and the heal.
Watch the rest of the raid unfold.
Accept congratulations from your clan mates for being so good at war raids.
(No execution notes)
This raid really plays off of the valkyries, which have very high health and damage relative to their housing space, making them arguably the bests troop in the game.