: Build Comms Turrets early and upgrade them to earn interest at the end of each round. The interest is typically capped at $50 per round , so aim to keep a cash reserve to maximize this passive income.
: Add a Comms Turret to every fire base to enhance range and start generating interest. Place at least one Anti-Air (AA) turret in a spot that doesn't block ground-based fire lines. iBomber Defense
: Focus on Machine Gun turrets. Get them to level 3 quickly to handle light units. : Build Comms Turrets early and upgrade them