First, extract the mute prisoner, ideally while he is still located close to the Mountain Relay Base bridge, or on the road beyond it. Secondly, do not fire the Honey Bee. Thirdly, destroy Smasei Fort's anti-air radar to unlock a new (closer) landing zone. Finally, defeat the Skulls by countering their melee attacks, then follow up with machine gun fire while they are briefly disabled.
