That order is the whole technique. Two sprays of the heavier scent on skin, a minute to let it settle, then one light spray of the brighter one over it. Not the other way round: a light scent under a heavy one is a scent you will never smell again.
Weight decides the order. The heavier, deeper scent goes on skin first and holds the pairing down. The brighter one goes over the top and is what people notice first.
A shared note is what makes two scents one. Two bottles with nothing in common smell like two bottles. A note they both carry - amber, musk, a wood - is the seam that hides the join.
Less of the second than the first. Two sprays and one. If you cannot tell where one ends and the other starts, that is the point.
Open the layering room to work out a pairing from any bottle you own.
