@Ren I do seem to get the same vibe as your current self-typing from you! Something like a N-subtyped NiFeTi I don't draw a super-sharp distinction between socionics/mbti/jung, mostly because I use ideas from all of them and prefer to think there are many versions of the same pattern going on.
The subtle thing to unravel is I think a lot of our difference in vibe is also coming from enneagram differences. I don't think all Ne-ish people have my goal of just understanding the many angles and approaches to things in as exhaustive a way as possible. Like Jolanda/I briefly exchanged, I think there are Ne-ish types who I'd call more the optimist types than the skeptic types, the types that grow enamored with a possibility rather than just going from one to the other with skepticism/detachment.
I could see 5-ish/4-ish vibes to your process similarly. But it does seem to be set into operation via Ni/Fe/Ti!
Often, Fe has a somewhat more detached vibe to value-judgment, since the value is experienced as suggested from things independent of oneself, whereas Fi is almost like the fundamental defining bounds of how one relates to things and thus how one can find value/not.
Definitely get a Fe vibe from ya.
Plenty of Ti-ish stuff that isn't really INTP-mistakable unless viewed totally out of context of the rest.
The vibe I often get from Ni-ish people is more of building a picture than laying things out.
I often think about how 6-ish Ni-ish people differ, e.g. how would a NiTeFi skeptical type differ from me? I think there's one major difference: both struggle with doubt, needing to find a way to seek certainty, and so on. I think I have more faith in the idea of being able to do so by laying everything out as completely as possible.
Whereas there's a more pragmatic vibe to Te/Fi, almost like the subjectivity of Fi is complemented by Te's goal/result/algorithmic orientation. A lot of the times a way to deal with doubt/never commit to a possibility is to say "it depends what your goal is -- you'll adopt premises relative to that."
Ni actually can pair very naturally with 6 because while it's subjective, it's unconscious -- we often associate subjective with what we have most direct access to, but that's far from true of Ni ... being if anything closer to the unconscious.
But of course, your vibe isn't the 6-ish kind.