I am of the school that believes that Nitrogen should always be the highest macro, followed by Potassium, and with Phosphorus being the least. (always) Some people believe the traditional advice, that heavy flower/fruit crops need increased, or mega doses of Potassium and Phosphorus. I (and some scientists) have just not found that to be the case.
I think that sometimes we get our concepts confused. A lot of the things that are done in commercial agriculture, don't translate well into hobby growing. Many of the things that dirt farmers do, they do, not because something isn't present, but because it isn't immediately available. And they grow this one crop, with exactly one season, that goes through carefully timed phases, and at the end, they don't want it green and lush - they want it dry, so they can harvest it.
For us, though, we should be rocking plant health until the day our plants leave us. Or so I believe...