This is really simple if we are going by Enneagram.
Firstly, there are the all around INFJs 4's, the aka deep and introspective ones, who are also called the Individualist, the "special snowflakes".
Then there are the 3's, the more Fe-ed INFJs, usualy have a artistic and extravagant personality and style.
There are many 7's INFJ, always ready for fun and seeking pleasure...they are distinguished by their very erotic desires. A kind of "artistic erotism".
And also there are the "rational romanticists" ones, the 5s, like Niels Bohr was. Thos are the ones that have a more developed capacity for logic.
I know alot of INFJs think they are 8, but that's just crazy, really crazy. There are INFJs in position of leadership I am sure, but I don't think there are INFJs who have the personality of a leader naturaly, strong, courageous, assertive and wilful. That's just not INFJ...its like you would say INFP Enneagram 8...that's how it sounds also for INFJs being a supposed 8.
There are probably more INFJs 9's also.
It is more likely that ENTJ is 8 because it has both Te and Se in its function order (dom-tertiary)...with a primitive Fi. ENTJ, ESTJ and ESTP is what I see for 8. ISTJ
maybe, but Te auxiliary, like INTJ is not the same as Te dominant.
On INFJ 7? No. The difference between 7's and 4's is that 7's use Ne and 4's use Ni. Ne-Te looks different than Ni-Ti. ENFP vs. INFJ...there is a difference, the former will seek out others much more than the introverted INFJ. One is an introvert, the other is not. Moreover, if you put INFJ at 7, then where do you put ENFP, which is the type that heavily correlates to type 7 (because of Ne)? ENFP's see themselves as INFJ-like, but from a personal standpoint, I don't think the feeling is mutual. An INFJ in the grip of inferior, animalistic Se might indeed resort to self-indulgent and eccentric behavior, but they will be functioning in an unhealthy manner. At some point they must balance themselves with Ni once again. This is not the same as an Ne dominant ENFP, who will be prone to pleasure-seeking behavior "outside of themselves" at baseline. A normal functioning INFJ is not an extraverted, pleasure-seeking type because they suppress inferior Se and express dominant Ni. They might seek intense, internal experiences that set off their imaginations and give rise to a treasure trove of feelings, but it is altogther different than the behavior of ENFP 7's, or other extraverts that can fall on the 7 line, like ENTP. The Ne-Ti/Te line gives both types a frenetic quality, with Ne providing endless positive possibilities for the people, places, ideas and things they interact with. 4's are not 7's, both are idealists but 4's will intensify negative feelings on purpose, while 7's want to be distracted from them.
I don't see INFJ at 8 either, even though it is thought by some that somehow Ni dominant is even in the same universe as Te dominant. Te strategically organizes facts, plans, data, people and objects in their external environment, while the other? Well Ni is simply and subconsciously "gathering impressions"
that don't organize anything in the external environment. One is a field marshal, and the other, a bookworm. Moreover, rationalizing how an Ni-dominant can somehow make its shadow function (Te/7th) more powerful than a Te dominant that has used that function since early childhood, is a stretch of infinitessimal proportions. It would also mean that it supplants the previous dominant function Ni, and then how does that work? Nope...not seeing it.
The rational romanticist would be right up my alley as a 4w5, but I am not blind to the fact that my Teritary Ti, developed as it might be, doesn't hold a candle to a Ti dominant that will learn things just for the sheer pleasure of learning, and stay with them long enough for complete mastery if desired. If you ever visit an INTP forum, you will understand quite quickly, the difference between 4w5 and 5w4/5w6. It is indeed noticeable. Ti tertiary is not in the same league with Ti dom. An INFJ that knows themselves really well will realize the difference...even if it drives up envy in the process. INFJ's aspire to their teritiary function Ti, so it is no surprise that such envy would manifest itself.