I'm pretty sure I'm 6w5 sp/sx. Or, at least that I'm 6. I think.
Some 6 sp descriptions really emphasize physical safety, paranoia about physical safety, having enough food and money etc. I don't relate so much to that sort of thing though I can be paranoid in that way, but not mainly. I do get anxious if I don't have steady work and that sort of thing, but otherwise I don't obsess a lot about money, food etc. I go with the flow about quite a lot of stuff like that - although I also think others can be stupidly laissez-faire about practical things. I'm kind of in the middle, I guess.
What I really related to were 6 sp descriptions (unfortunately I can't remember where I found the best one - possibly the Enneagram Underground site?) which highlight that 6 sp "protects" themselves by "going towards" others. Sort of like defusing potential trouble or warding it off by being friendly. That made SO much sense to me, especially as an INFJ and a fairly outgoing one. I have strong Fe. I know that when I "go towards" others, it's partly because I do like to be friendly and put others at ease, but it's kind of like a pre-emptive strike too.