I'm just going to give examples, because function theory is boring.
My ENTJ brother's job seems to be to ensure that his household is as stressed out as possible, a result of the overreaching perception that there is a set way that things should be done or that the means to any end is justified.
Helping a child sort boxes of cookies should not be a stressful ordeal, where multiple people hurriedly grab boxes and check checkboxes and work on multiple piles of cookies at once and bark orders at people. So I took the 'project' over and aimed to just help my niece figure out the best way to take on this task at her own pace, asking questions in order to guide her to a 'sensible' method.
His claim is that that's the pace at which the family operates and that they don't have time to slow down. Right. I have a feeling that those kids are gonna be pretty neurotic in the future if this keeps up.
So how does this relate to our NFP-NTJ dynamic? I guess having both of our hands in the pot at the same time means that one necessarily has to defer to the other, because our priorities are completely different and largely incompatible. But at least I think our priorities are understood by one another, which I can't say about every type dynamic.
Ah, recent experiences.