Do you think the ISFP 3 combination is possible? I' sure I'm a 3w4 and used to type myself as ISTP, but after I started watching videos with groups of ISTPs discussing I had to rethink that. I couldn't relate to most of what they were saying while they clearly were on the same page, so I started to dig deeper into the judging functions. Turns out I relate way more to Fi than Fe, and since I'm sure of having Ni ISFP is a possibility. But inferior Te + 3 sounds counterproductive, so I'm not sure.
It is possible, yes, but depending through which theory you look at it. Some JCF variant and CT will consider any type combination is possible, even if some less common.
An ISFP 3 is more likely to have a fixation on Te, for sure. In CT, FiSe l--l (ll-l, l-ll) are a thing and it is meant as something normal, and not just an unhealthy manifestation of a type. JCF theories tend to adopt the notion of loops and grips, which I wouldn't say are completely false tbh, but it discards the possibility of having a healthy relation to your lower functions, which I also personally disagree with.
In any case, from the perspective where lower functions can be developed healthily, they are also not deemed as weaker than higher functions. Functions that are weaker are the ones devalued in our consciousness, and this could happen to any function, even the lead to some degree, which also cause a lot of mental distress. This means that it wouldn't be a counter productive combo. It would make you more likely become a l--l dev, which implies you would have psychologically accepted to sacrifice endless perfectionism for efficiency and practicality to some degree. It creates a much more structured, scrupulous and uptight ISFP, who is concerned to actualize in the world the Fi Idealism that they have cultivated over time. It also makes that sort of ISFP more ambiverted, so more agile into switching their attention from internal to external objects without being completely drained. (Note: I don't mean being more social here. The notion of extroversion and introversion are meant as the capacity to focus on internal or external objects; situation, issues, opportunities, etc.).
Actually, FiSe l--l and ll-l are pretty common in the celebrity world. It's not surprising knowing they often are 3 core/fix and given the requirement in that kind of environment to strive, perform and outlive it.
In the end, it is a possible combo, not unlikely or stretched, and neither dysfunctional, quite on the contrary. It depends from which theory you address it, but I do believe cognitive function manifest in more flexible way than the classic hierarchy with linear development. It's up to you to see if it helps you understand yourself better and so, if it can make sense in how you conceive typology.
I hope it could help you, if you have any other questions, you're welcome to ask x)
