After getting a decent amount of resources, begin building your arsenal by maximizing your Deployment Yards and increasing their upgrade level. This will boost the total number of troops you can deploy each time you attack an opponent. Use the Ballistics Lab to upgrade your human troops, which can boost those who undergo training. Later, you can extend your forces by using big vehicles and aircraft. Do not rely on single type of unit. Each unit type has a purpose; use them to your advantage. Each unit has their own advantage and disadvantage. Develop a strategy that can minimize the disadvantages by mixing different types of units in battle. Only have a few Juggernauts and have the rest or your troops as Snipers. Send in the Juggernauts first to draw enemy fire, then use the faster Snipers to get resources. This method is better for resource collection rather than earning stars. Intentionally keep your ranking low by losing when needed if you are interested in resources. Do this by sending in a single troop into battle then retreat to lose the fight. You will get a ranking penalty, which will give you more easily accessible bases to farm resources. Always send in as few troops as needed to win in order to maximize profits and to allow you to attack frequently. Do not use your Hero's special abilities; they are a waste of points if you are only interested in resources. If you want to increase your ranking instead of collecting resources, upgrade your troops to their maximum levels. Only send in the best possible ones. Deploy Infantry, because they are cheap and may even shoot over walls. Juggernauts are the main attack power. Use your Hero to take out the towers, but send him in after your troops in order to protect him. Use your Hero's special abilities, such as the Helicopter. Work on taking out difficult reach defensive towers.