Primacy of consciousness refers to the notion that mental events can exist without any physical existents to support them. This position is also not Cartesian Dualism. Cartesian Dualism is the position that mental existents and physical existents are independent. There is no reason to suppose it possible for mental existents to exist without a physical substratum to support them. Nor is this position idealism.
Idealism is the notion that mental existents are somehow more real than physical existents.
There is no such thing as degrees of reality in this context.