Boring answer, but sp/so for all of them
9-I have a lot of mind-numbing 9ish behavior(snacking, napping, music, TV), and I like my peace and quiet. You could argue so or sx second for me as I'm just so merg-y. When I spend a lot of time with someone, I adopt their speaking habits and even things like their favorite color. I like to think of myself as an attachment triad meme. While merging romantically is really nice, I'm not that intense of a person even with 9 subduing things, so I lean sp/so.
4-As meek as I look, I relate to wanting to keep that strong face. I can be a bit shyer about my emotions than other 4s/4 fixers but emotional depth is important to me and they tend to bleed into my art. They're said to look 7ish at times, and I'm not super 7ish but I can be a real goofball. I relate to how they enjoy the finer things in life and have a keen sense of style without being super flashy. So second, because I have a habit of comparing myself to other people because I naturally just feel like there's something deficient about me.
6-I try to eschew death. Sp 6s are supposed to be really loyal types, and loyalty is something I care a lot about. Social 2nd cause I become loyal to different groups, like forum would count as well as different fandoms. Even if I don't talk to a person anymore, they'll always be stained in my memory.