I designed this one to control entry (and quick exit) of giants and goblins, but over the past 4 days it's proven highly effective against all other enemies as well. The town hall is outside for obvious reasons so you're generally going to lose points every fight, but you'll definitely protect those valuable resources. Northern and southern walls are reinforced to discourage against attacking outside the preset route. Air Bombs are placed on northern wall to protect against balloon attacks. One resource and one defensive structure must stay outside the entryways to the core in order to group up all attackers before heading straight into the spring trap. You'll want to make sure it's a bit higher level so it's not destroyed before the other units have a chance to get there and group up. The two bombs behind it are enough to take out any group of barbarians/goblins or seriously injure any giants that make it past the spring. I've successfully fought off several TH6 raids with this build and greatly minimized the resource and gold hit from enemy raids. It's a fun map to watch the replay of attacks on, hope you try it and enjoy it!