first off you have to upgrade your cannons. make all of them lvl 8-9, then you can move on to the wizard towers. make all the wizard towers lvl 4-5 and upgrade all your air defences to lvl 4. also make all the archer towers lvl 6. next, upgrade all walls to lvl 6.
you should also change the lay-out of your base, i don't understand why you put your collectors inside your walls. put all collectors outside your base, preferably near the walls though. then put your storages in the middle of your base and use wizard towers to guard the storages. also put mortars near these so that all the mortars are guarded by wizard towers.