I originally contrasted Ni with Ne, so people would better understand Ni in relation to time and relevance of ideas. I didn't mean to imply that they were complementary, sorry.
Some people are good at brainstorming ideas, more Ne, while others are better at understanding the potential ideas and possibilities over time, more Ni. However, theoretically if a person could use both Ne and Ni in their ego block, there wouldn't be any sustainability of process. Yes, both are perceiving functions, and need the work of a Thinking or Feeling judging function to be manipulated appropriately.