Statistically speaking, INTP is way more likely to be 5 than 6 (like 6-15x times, literally).
Almost half of the 6 wing is SJ.
However, I did read a generic description just now of type 6, and its really like a double edge sword, so SJ in one terms and so NOT SJ in other terms. The term "rebellious" in MBTI is the most strong and associated in INTP type (the option that has rebellious or something like that is for INTP in the MBTI test I made). "Rebellious" should be the last term we would associate with SJs.
"Because of this reactivity, no matter what we say about Sixes, the opposite is often also as true. They are both strong and weak, fearful and courageous, trusting and distrusting, defenders and provokers, sweet and sour, aggressive and passive, bullies and weaklings, on the defensive and on the offensive, thinkers and doers, group people and soloists, believers and doubters, cooperative and obstructionistic, tender and mean, generous and petty—and on and on." [Enneagram Institute]
Well, Im wondering if it is really proper to address a type for that.
Anyway, I still think that 5w6 is way more likely tha 6w5 but I do think you have P/J borderline, so that really mix stuff.