I think this is right -- S knows how to organize and utilize the real world. They're the people who can give you not only directions but instructions, for stuff that you may not have any great interest in as an N but you need to get it done. S knows a method and they can show it to you so you don't have to reinvent the wheel. S is good for teaching N to follow instructions, I think.
N can be extremely observant of details but it has to be something we're interested in.