Nothing. You cannae have Ni Fi without the Te.....See.
Ni Fi loops are pretty much just crap IMO.
Sure there are times when an INTJ will ride an emotional roller-coaster to ButtfuckVille but it's just a temporary thing. They don't miss Te out of thinking entirely otherwise they wouldn't bother catching the bus/train to work.
Everyone has varying individual weaknesses and strengths and everyone goes through their own particular difficulties. This Ni >Fi thing is just a means to explain it. It's not technical within MB theory just an add on that really doesn't make much sense when you think about it.