Cannons on this adventure really only save you that 8-18 cav on the Bone Church.
Troops needed: 370R, 145E, 250C, 182Can
(if you want to do a short run, can skip all leaders but L1)
Move to X1:
C1: 18R, 44E
L1: 37R, 195E
Move to X2:
C2: 10R, 1E, 239C
L2: 55R, 145E
L3: Wave1: 32R Wave2: 200C
DC: 112R, 1E, 137Can
Move to X3:
C3: 250C
C4: 32R, 115E
C5: 27R, 124E or 200R
BC: 67R, 1E, 182Can