The only real way to fly a glide approach is to close the throttle at a position from which a power-off approach can be flown all the way to touchdown. Anything else is rather a fraud.
I'd prefer to do so from 'low key' at 1500ft as 'Say again s l o w l y' describes. But at other aerodromes which require rectangular circuits at 1000ft, it has to be somewhere on base leg.
What is the prupose of a glide approach? As far as Im concerned, it's to learn the final part of a forced landing without power.