So there is a lovely INFJ called Harry who has developed his own 8 function model and so far he has been on the money for how this entps brain works. He's done a video on ENFPs now so I'm wondering how accurate you folks find it. (Rough Theory background) his system works on a convergent stack, you Dom and 3rd function acting as a positive motivating force, and a divergent stack, 2nd and 4th functions) acting as a more critical and defining element. (He has a video series that defines his system, im probably doing a terrible job of it!) Additionally his system employs dipping into your shadow functions. What I like about it is how the functions are acting in concert with each other which provides another avenue for typing imo. Anyway its pretty detail heavy and probably requires researching the theory to follow it properly, but I'd curious how well he's done on a type with opposite functions to his own .