Attack a village where the wizards tower or motar is near a wall

Is this idea good or not. I think it kinda helps the flood troops on surviving longer.

Destroying the only 2 defenses with splash damage is definitely the best thing to do. But most good base designs include those defenses in the centre of their base or protecting storages. I don't know how long you would have to wait for a base with them near the walls though :)