Besides the defensive turrets that are used to protect your HQ, you can tap the HQ to request troops from your clan mates or to build/upgrade your mech. Defend all the routes to your base. Focusing only on the best route is not recommended. The more buildings you have on a route, the resources your enemy will capture if their attack succeeds. The type of building does not matter. Use all your buildings for defensive purposes. Position them in front of attackers to slow them down. Strive to increase your survival chance. This will also chip away at their heroes' health down and increase your chances of killing them. Do not place your defensive turrets outside of a path, such as dropping them between two lanes to have both of them covered. When a turret is outside a lane, enemy heroes will not bother to attack it. Position non-combat buildings first then set towers (Mortar, Minigun, etc.) afterwards. This forces attackers to get their health droped when dealing with buildings that are less important and allow you to hit them hard later. Doing this will also give your turrets a chance to provide supporting fire for other buildings. Each turret or mine that you tap will have a red area around them. This represents their area of effect. Position higher range weapons such as the Mortar near the end to allow them to provide the best defensive value. Mines are very useful, as they can decimate the health of the attacking heroes. Tap "Shuffle" on both routes until they are very close to each other. The closer your routes, the more defensive bonuses you can get from the same weapons on all routes. Position mines so that two of them can work in tandem. Also try to keep as turrets and weapons within the mine's area of effect.