I reported fruitions to the then head teacher of NZ Vipassana in Goenka tradition. Back in 2010 on this 10 day course: http://thehamiltonproject.blogspot.com/2011/06/yogis-journal-from-chronic-dark-night.html?m=1

He gave me very good advice. I don't think a normal AT would have. 

Who are these attending and assisting teachers? Is there a list somewhere? How do they get to that spot?

To answer, no I have not but I'm gonna bring up at my next retreat this month and will let you know how it goes.

We'll I went on retreat and asked. He was a bit put off by my questions and resistant. His focus was on teaching the techniques and concepts surrounding the techniques. I asked a few questions prior which may have set the assistant teacher into a certain resistant reaction. They assume you are a beginner and treat you like one as they sit on high.

My conclusion is that it is not very helpful to report a Nibanna experience to an AT because they will just say "great, now do it again for good measure." Most teachers would likely say that as opposed to dogmatic scutiny like some on this form do, hem. I kinda agree with the advice. Replicate the approach and see what happens.

My opinion is that you don't need a phenomenology decriscription vetted by a "teacher", or random people on a forum that see this as their purpose, when it happens. The need will fall away as it is unmistakable. If uncertain, try again until certain. Be your own observer.

Dream Walker, do you ever wonder if you are controlling? Do you ever wonder where it comes from? Is it attachment and desire? Wish you the best on your path.