Defense Points: 1000
Enemy Spawn Point (Ground): Four
Enemy Spawn Point (Air): Two
Target to protect: One Main, Two sub-cores
Greystone Terrace leads to the Main Core's eastern side. There's a Rocket Cart along the way. Placing barricades and concentrating your defenses within the Rocket Cart's range will increase its effectiveness.
Stargazer Plaza leads to the eastern sub-core. You can concentrate your defenses on the ramp to impede enemy progress. Placing Lighting Auras at a distance from the barricade will be effective in stopping the enemy's ranged units and damage them while they're attacking your barricades from a distance.
Inkeeper Hill leads to the western sub-core. Placing barricades near the Rocket Cart's range may seem like a good idea but I will suggest against it. This is because long-ranged enemies like the spearthrowers and the dragons can out-range your defenses before they can even get into the Rocket Cart's range. Place traps along the winding path and blockade near the ramp to maximize your defenses.
The bridge connecting the sub-cores allows you to move between the two locations fast while giving long-ranged characters to attack the enemies below.
Enemies from the Main Street will have the shortest route leading to the Main Core. Barricading the area right outside the nearby dynamite/ TNT trap will help you in whittling down enemies faster when activated at the right time.