Number of Wall Breakers required to break through walls

WALL BREAKERS REQUIRED TO BREAK THROUGH WALLS
WALL LEVEL	1	2	3	4	5	6	7	8	9	10	11
WALLBREAKER LVL 1	x1	x2	x2	x2	x3	x5	x6	x7	x9	x12	x15
WALLBREAKER LVL 2	x1	x1	x2	x2	x3	x4	x4	x5	x7	x9	x11
WALLBREAKER LVL 3	x1	x1	x1	x1	x2	x3	x3	x4	x5	x6	x8
WALLBREAKER LVL 4	x1	x1	x1	x1	x2	x2	x2	x3	x4	x5	x6
WALLBREAKER LVL 5	x1	x1	x1	x1	x1	x2	x2	x2	x3	x3	x4
WALLBREAKER LVL 6	x1	x1	x1	x1	x1	x1	x2	x2	x2	x3	x3