A nose up descent with a low airspeed is best.
I did one on my multi engine instrument flight test. The examiner thought it was great.
You pull back on the power to idle.
Raise the nose like you are wanting to enter a stall.
Let the airspeed wash off.
As it approaches maybe 10 or 15 knots above the stall, you keep the airspeed there by lowering the nose.
Normally when deliberatly entering a stall, you would continue to lift the nose until a wing drops.
But you lower it. To maintain a speed above the stall.
The lift has already reduced enough so that the aicraft will descend.
But it does it with a nose up.
Airliners do it on every landing, but its being done with power applied and so its a gentle desvent.
If you wanted to drop from the sky when you are way too high on an instrument flight test, its best.
You will drop like a stone and have a extremely steep angle. With very little ground speed.
If you want to get some airspeed back fast, just lower the nose and apply power. It you want to arrest your descent. Just slam the power levers forward and you are already in a climb attitude.
Its not for the kind of pilot who is not confident.
But if the plane is part of your body, you will get it naturally.