Autothrust is recommended for all approaches and landings in the B777.
From the B777 FCTM:
"When using the auto-throttle, position command speed to VREF + 5 kt. Sufficient wind and gust protection is available with the auto-throttle engaged because the auto-throttle is designed to adjust thrust rapidly when the airspeed drops below command speed while reducing thrust slowly when the airspeed exceeds command speed. In turbulence, the result is that average thrust is higher than necessary to maintain command speed. This results in an average speed exceeding command speed."