Although it is very hard to isolate cognitive functions and describe them, I' m curious about your opinions about them.
My personal views are that Te is most of an hierarchy function which sorts and structure feelings, thoughts and objects.
So, Si - Te will sort sensations and objects, quantify time, Fi - Te will sort feelings and give them values, Ni - Te will sort ideas and plans, put them in the right sequence.
Ti is more like the philosopher of the mind, interpreting thoughts, external impulses and feelings, choosing the right explanation for everything. So Ni-Ti and Ne-Ti will be like a strong future debate, the difference being that Ni will generate one thought into multiple ideas, while Ne will absorb multiple thoughts and put it in one perfect idea. (My view of this combination of function). In rest, Ti, is very hard to detect, Ti sometimes will be identified as a Fi Function, yet it mostly deals with objective subjects. I don't know how Ti functions in the Mechanic and Doers personality, it' s like there isn't any mountain they can't climb, or there isn't a thing they can't sell, Ti with Se might be the competitive nature of man. Ti and Fe will find the right word for other people feelings. Ti and Si, Fi used together imaybe the anxious state of being.