I think they should make a catapult. It would be available at th 6 because the last couple new defenses have been only available for high level players. It would be like a mortar, but it would be faster shooting and less damage per shot.
Splash Damage- 1.5 tiles
Damage Per Second- 2
Damage Per Shot- 14
Hit Points- 550
Cost- 500,000 Gold
Build Time- 1 Day

