No, I am firmly commited to dualism until someone can explain how the thought becomes action. Once the nerves are fired up there is no problem, but how does the thought activate the nerves? Parallelism seems to be another word for dualism.
I use dualism in the sense that they are the fundamental bases of the universe. Your example: matter and spirit (or whatever terms you've chosen).
I think temporality splits the world of spirit. The only duality I recognize(not necessarily antagonistic) is between the temporal (or extensive) and the eternal. Obviously the temporal is not also eternal.