Defense Structure Of Wall

For Wall,do not place (2 Layer Of Wall),because they does not worked against Wall Breaker anymore as we know they change A.I Wall Breaker to able to break 2 Layer Of Wall.
For Wall,if you cover your Wall with nothing then it will be useless.Cause A.I Wall Breaker only target the Wall that have building inside.
Wall have certain amount of life so a "Moderate Defense" is to have your Wall Level 7,but that is only for Town Hall 7.But try to have your Wall level to be as same as your Town Hall level.