I've only read a number of posts, but I did read your last one, so here are my thoughts on sx/so vs sx/sp:
Which is your "absent" (third) instinct? Your "blind spot"?
Sp or So?
This is kinda like solving for the inferior...
Do you not give a shit about society? Do you not care much about your social life? Does the thought of hanging out with people kinda sicken you, or excite/energize you? When you imagine being with your perfect partner, what does your energy want to do: pull them back to your cave, fuck their brains out, and never leave? Or, after fucking one another's brains out for a while, go forth and conquer the world? Would you rather hide in that cave forever, or make society your bitch and have it give birth to your progeny, become your progeny? If you were a supernatural entity, would you reside in Heaven, and be a god, or reside underground, and be a hungry ghost? Is your energy more outward and expansive and blasts onto other people, or inward and densifying and sucks everything into your chest? Do you have more trouble feeding yourself properly, paying your bills, and keeping your place clean, or maintaining social contacts, going out with friends, having a social life?