I have seen this question many times: What troops should I use to attack in clan wars? This article is based on my experience as a Town Hall 7 and Town Hall 8 player.
Troop Levels
At Town Hall 7, you are advised to aim for the following troops levels in order of priority:
Giant level 4
Archer level 4
Wizard level 4
Barbarian level 4
Dragon level 2
Forget about Healers, Balloons and Goblins. I do not find them useful.
For early Town Hall 8, you are advised to aim for the following troops levels in order of priority:
Giant level 5
Archer level 5
Wizard level 5
Barbarian level 5
Troop Composition
The troop composition below have worked well for me:
Scenario 1 – Weak Air Defenses
2 Air Defenses not exceeding level 4 or 3 Air Defenses not exceeding level 3 would be considered weak. Just attack with 10 Dragons plus another Dragon from your Clan Castle, if possible. This is a near guaranteed 3 star attack.
If there are 3 Air Defenses at level 4, it is a 50-50 chance between 3 stars and 2 stars.
Scenario 2 – 2 Layers of Walls to get to Town Hall
The troop composition in the table below has worked well for me. Ask for Wizards for your Clan Castle to complement your attack force.
The Barbarians and Archers are used to draw out the Clan Castle troops while the Giants and Wizards are the main attack force.
Release the Wall Breakers in 2 waves of 3. Wait until just after the mortar shots have landed before releasing each wave.
Giants 18
Wizards 16
Archers 29
Barbarians 5
Wall Breakers 6
TOTAL 200
Scenario 3 – 3 Layers of Walls to get to Town Hall
The main difference here is that we use 3 waves of wall breakers instead of 2. Release the Wall Breakers in 3 waves of 3, 3 and 4. Wait until just after the mortar shots have landed before releasing each wave to avoid having your Wall Breakers getting decimated by Mortars.
Giants 18
Wizards 14
Archers 29
Barbarians 5
Wall Breakers 10
TOTAL 200
Vingaard