I'll bump your thread..
From what I've seen, many people recommend taking the NP before even the DA. I guess you could say that you indirectly need one. Maybe someone else will be able to elaborate a bit more.
You don't really have to have an NP they just suggest BCMSN level knowledge for the DA, I'm probably going to do my DA before I start my NP just because it encompasses alot of different things that I want to learn about now.