180 to 6 is just doable in a 747, as is 170 to 5 and 160 to 4. Note this is distance to the threshold and not the actual DME reading which is often not co located and requires a headwind on approach and a three degree slope.
A decent controller can achieve the same landing rate without the stress by slowing the aircraft earlier and achieving accurate final separation earlier. This controller is trying to mitigate her lack of accuracy and forward planning by asking the flight crew to perform an unwise higher than desirable energy final approach. She then punishes a crew that demonstrate airmanship and refuse an undesirable clearance. They also demonstrate airmanship by refusing the clearance instead of agreeing to it and then decelerating when they want to as many crews would have done.
Im sure an ASR was filed and I doubt anything will be done.
LD