How do you win on age of defense 3?

To win in Age of Defense 3, focus on a balanced strategy of resource management and unit deployment. Prioritize upgrading your defenses and unlocking new units while continuously attacking the enemy to chip away at their health. Utilize ranged units for effective damage from a distance and keep your resources flowing by defeating enemy units. Lastly, adapt your strategy based on the opponent's tactics to maintain an edge throughout the game.