Can you give the simplified descriptions of every function (as Viktor's descriptions are long and even ambiguous)? For example, how is IEI's 2D +Se different from 1D -Se? Poor ability to grasp the concrete details of the world (-Se), but relatively better ability to push themselves for work and force other people (+Se)? For example, I am extremely lost most of the time and live in my head, and my stuff gets lost and I don't remember how that happens, but I have good reactivity / responsiveness and general pushiness.

IEI:
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4D: -Ni, +Fi, +Ne, -Te
3D: +Fe, -Ne, -Ti, +Ni
2D: -Si, +Ti, +Se, -Fe
1D: +Te, -Se, -Fi, +Si