Post yours, then describe any observations, thoughts pertaining.
As an so/sp, I've noted that the give-and-take is more balanced with another so/sp, a sp/so, or sx/sp, e54/6 or otherwise. sp/sx 5s don't comparatively require much breathing room, while so/sx and sx/so 5s are far less prone to overrely on facts than so/sps.
Emphasis placed on discovering interesting social networks while maintaining complete autonomy. Subtly applying influence with others, strangers, friends of friends to achieve results. Selective, internally active, probing nature, warm but dry, disconnected, intensely ambivalent regarding daily affairs. Sometimes gripped with anxiety when overwhelmed with possibilities, like being completely functional and aware of everything while encased like han solo.
Feel more at ease when I'm able to lightly touch bases with several people at once, though won't overturn an engagement if I think it'd disturb the wider rhythm. Particular, ridiculously heavy focus on first impressions conducted via unconscious channels creates this mental pouring down the freeway with with parking breaks on scenario because one on ones don't serve my primary intellectual interests at all.
I've only known one so/sp e5 infp network; most I've kept in touch with are derived of e54 intps. So comfortable, but often it's best just to let it go, as there're always similar opportunities with an alarming 6 something billion humans worldwide.