simultaneously reduce thrust slowly so that it reaches the idle stop at touchdown
That is not what my Boeing instructor pilot taught us. (he accompanied the crew on its trans-Pacific ferry flight). Quite the opposite in fact.
His advice was to simultaneously flare and close the thrust levers sharply against the idle stops. He said you don't want excess thrust once the flare is commenced especially as it takes time for the N1 to reduce from approach thrust present at the flare to idle N1. A slow reduction of thrust at the flare is counter-productive as it can extend the landing roll.