-I would swap the skulls to your inner walls and work outward.
-If you get Giant/healer'd a lot I'd swap a mortar out for one of those outer AD's and have it protected. You could swap the ones to the north and the mortar will still be protected by splash, albeit partially.
-Certainly work on defenses at this point. Walls are strong, just upgrade when you need to dump loot or are truly maxed. Mortar>teslas>archers>cannons is the order I'd personally go with. Nice to see your wiz towers done and out of the way.
-Lightning spell saves my a♥♥ when I need that extra 2% for the star. Level 4 is good enough for this. Like someone else said, upgrade whatever you use most.
-Overall nice job of balancing out your upgrades.











