1. If you can train BalloonsSame to Level 10, 11, 12. Like Canons, Mortars cannot attack aerial units.
2. If you cannot train BalloonsYou must train Giants, and you need 14 or more Giants. Inside of the walls, you can put troops on the pointed areas in the following picture.
In this stage, M is for Mortar, aerial defenses are not. Use a Ballon! Easy and reasonable!
If you don't have Balloons, use Giants instead. It costs you a lot.
[Level 14 - Megablaster] Hints & Tips | Clash Of Clans
[Level 15 - Immovable Object] Hints & TIps | Clash Of Clans
Single Lv10-19 | Clash Of Clans
Single Lv20-29 | Clash Of Clans
[Level 18 - Fool's Gold] Hints & Tips
[Level 15 - Immovable Object] Hints & TIps
[Level 46 - Kitchen Sink] Hints & Tips
Clash Of Clans: Introducing Town Hall 3 farming base