I haven't practised this in a B206, but as I mentioned briefly, I have done it in an R22, so perhaps some detail would be of interest.
Having discussed it: "What do you think you do?" asked the instructor. I said to slow down, wrong side of drag curve etc. "OK", he said, "try it". I can't remember how much collective we had, but we were straight and level, so I'd guess around 20". I slowed down, and slowed down, and slowed down.... Eventually we did get a ROD, but despite power curves and theory and all that, it really wasn't going to work. We were at 1000ft, very low airspeed, descending with no collective...not nice!!! So..."I'll show you", said the instructor. He rolled off throttle, at the same time putting it into a turn to raise the RPM. He controlled the RPM with throttle and angle of bank, and as far as I remember it wasn't that steep a turn. At any rate, we descended in a neat spiral in a very controlled fashion, until he rolled the wings level close to the ground, and I can't remember the details of what he did then, but I think all you can do is lose translational lift and do a run-on landing.
Now, it may be different for a B206; I don't know, though I can't think why it would be that different. And the fact that an extremely high hours instructor makes it look easy.... So I'm not trying to say what's best, and I hope I never have to find out for real
. But I thought this might be at least vaguely relevant.