We don't formally teach total engine failures to a halt but we do run modules where it's possible for an instructor to allow an exercise of this kind to run to completion, should it be working out reasonably well. Otherwise, there is a fortunate restart.
We also discuss the various control methods available but the primary focus is on what might have caused the stoppage (fuel icing, volcanic ash, whatever) and responding appropriately to try and get the engine(s) to relight.
There are many ways of conducting a glide approach, all having their own good and bad points. Most of them appear to fall into two main categories:
a) Come in at normal speeds but higher than usual:
+ More thinking time
+ Adjustable
+ Can be flown like a steep NPA
+ Non-flying pilot can monitor more easily
- Requires positive control of the approach angle
- Unfamiliar position/picture
b) Follow the standard vertical profile in the latter stages but faster:
+ Problem reduced to one dimension
+ Familiar position
+ Less affected by wind
+ Allows a precision/coupled approach to be used if available, down to 0/0
- Timing of gear/flap more critical
- Good energy management required
The "spiral down onto short finals" method works too but it can be more difficult to monitor and how successful it was may not become obvious until quite late.
Overlaying all this is what is the definition of "success" when dealing with a dead-stick landing? Many would say that coming to rest somewhere on the airfield with everyone alive is the prime objective, like BA038. Hopefully, if the approach is under control, there is decent chance of a touchdown, rollout and stop on the paved surface.
There is a balance between the limited practice/training time available and the list of mandatory and "nice to do" items. Realistically, when choosing scenarios, you have to take into account the probability of something actually happening in real life as well as the intrinsic value of that exercise. Current trends suggest that it would be much more effective to concentrate on things like unreliable airspeed or CFIT than having all your engines fail...