It doesn't seem to make a difference. I tried the Monod protocol 3/12, 1/10, 5/10 and they all arrive the same number +/- 5w or so. And I wouldn't call NP from a 1h race useless for most people. Race efforts are arguably one of the most accurate ways to determine FTP since it's hard to push yourself that hard in training.

Critical Power Calculator | Two Wheel Blogs

http://www.cyclingpowerlab.com/MonodCriticalPower.aspx