Sorry for the lateness! Lots of stress IRL right now. Am on my cell, so please bear with my shortness @Viridian, while I definitely could be wrong, the way you approach things seems more Si/Ne than Ni/Se to me - hard for me to really explain why, mostly a tonality. You seem to have a pretty concrete focus. Like @EJCC was indicating, I could definitely see an ISFJ 9 relating well to the NF temperament as well as the SJ temperament. My ISFJ 9 is definitely a progressive idealist in a lot of ways, and i think most of his groundedness is a result of being sp-dominant. I think if you were either INFJ 9 or ISFJ 6, your type would be clearer, so the only other possibility that's left is INFJ 6, which harbors a touch of dark paranoia i've never really gotten from you. My inclination wod be towards ISFJ 9 as well.