Switching weapons effectively is crucial. Here are some optimal combinations for different scenarios:

- Crowd Control (Weak Enemies): Minigun + Double Shotgun. Use the Minigun for continuous fire on swarms, then switch to the Double Shotgun for quick bursts against closer groups.
- Heavy Hitters (Large Enemies): Rocket Launcher + Lasergun. Use the Rocket Launcher for initial burst damage, then the Lasergun for sustained, precise damage on weak points.
- Mixed Waves: Keep your Minigun ready for small enemies, Rocket Launcher for large ones, and the Double Shotgun for anything that gets too close. Rapidly switch between them.
- Boss Damage: Cannon + Serious Damage power-up. This combination delivers unparalleled damage. Follow up with Rocket Launcher or Lasergun if Cannon ammo is depleted.
- Long Range: Sniper Rifle (for precision) or Revolver (for ammo conservation).
Bind your most frequently used weapons to easily accessible keys (1-5) for quick switching. Practice in less intense areas to build muscle memory.