Ni comes up with tons of ideas, hones in on one. There's an almost immediate desire to make that idea happen. Se is used to research and pull data and methods to provide a realistic approach to implement that idea into reality.
In reverse, I bet it's like:
Se gathers tons of data, honing in on a specific topic. There's an almost immediate desire to connect all the pieces in a holistic sense. Ni is used to find patterns within the data and bring everything together into a cohesive whole.
Does that happen with you?
I'm sure there's some writing out there about the Se-Ni/Ni-Se tandem and how it works. I forget who came up with the concept, though.