I am partial to using two subtypes since they are simple (intuitive and ethical) right now and there is enough variation of personality in those to explain differences if you are into that. The rest just seems to dilute the whole theory into something else. A couple of people seem to agree that I would fit IEI-IEI but when you start getting into IEI-SLE or IEI-SLI it just seems like people are trying to fit into "Cinderella's slipper" (metaphorically) when they don't. <--- I know, I know I keep saying this...
Bottom line is Ni is base function for IEI and if that is not your strongest function look into another type?
Must add Fe...