.. coming from another viewpoint ... if you need speedbrakes with flap close in (and they are pretty useless for other than generating discomfort at lower speeds) I would have thought that the approach has been so badly mismanaged (or ATC has thrown a late spanner in the works) that a miss (or other suitable management) would be increasingly attractive.
Surely better to be sufficiently ahead of the aircraft to predict the problem earlier and do something about it 20-30 (or more) miles out. On the FLUF gear out early, lots of flap and approaching limit speed will give you easily 1-1.5 per 1000 gradient. A while since I have played with the machine but that sort of figure sticks in my head for "get-of-jail-free-card" purposes ...