Select weapons that complement your playstyle while offering high damage and/or armor penetration. Assault rifles and sniper rifles are often good choices for high damage. Gear up with weapons known for good armor penetration when facing armored foes. Use a mix of grenades like HE grenades and Molotovs to deal area damage and flush out enemies. Above gear, honing your skills, especially in aiming and understanding weapon recoil, will significantly contribute to higher damage output.