Yeah probably, the 5 really adds a whole different, smoother and less emotionally charged,
edge to your writings. More intellectual air, but an Fi dom fits, more than likely focusing on understanding things related to it than strictly 'creating'(though I am sure that is done as well). More behind the scenes, removed.
Sometimes you seem like more of an Fi dom with more of a sort of reflexive aggressive background reaction Te. But I suppose it could just be your typing style, so I could see NTJ, definatly of the Fi/Te stretch. And I guess you do sort of vibe kind of like rex to me, so that really could/does work as well. And yeah, get that Ni from you. So, yeah NTJ works just making apt use of different functions.