I'm not really sure, in both ways. I might be observing my friend's behavior, but for example I myself am also quite strong with Te-Fi. And the cognitive function test always show Te-Fi as my strongest.
I know they're on the opposite side of the scale, but I think for example that Te-Fi really can link together very well. Imagine a person who has a very strong mindset of how things should be and a very discriminate about morals, aesthetics and all those nuances etc. (Fi). And combine that with an extraordinary skills for assessing and ordering the outer world (Te). That is one ruthless politician, Machiavellian even.
The Ni-Se thing is harder to imagine, I think.