Whatever the procedure published by Boeing, Airbus or else, no one has ever says it is a SOP (while many new gen pilots appear to believe so).
They only tell you how to come out of an occasional and unplanned situation should you have the time, and conditions to do so!!
The best answer is DON'T do it on purpose nor on a regulat basis (I'd rather save my arse than 100kg (lbs) of fuel), or go around!
I know personally one pilot that was very fortunate to survive the false glideslope captured from above, only to hit the planet at an unexpected location .......... he knows a lot about it.
He NEVER DIT IT AGAIN and NEVER WILL do it again.
But I might be old fashion...
MP