This might be a good point to suggest you re-read my earlier hints. I suppose you could eventually get to the answer via geographic elimination, but that will be boring and might take a while. You won’t get there by guessing the names of mountains that you know; I doubt if any of you know this mountain by name. So I’d suggest following the abstract connection, which I promise you is not obscure.
Feature? No. The AOTC is the name of the entire mountain. The mountain does in some broad sense have a relevant “feature” but it is one that many mountains possess. Kunlun Mountains? No.
Form of AOTC? The AOTC is [Mountain Name]. But the judges would accept an answer in a similar form to "The mountain which stood in for the Lonely Mountain in the film version of the Hobbit" Aoraki, which stood in for the Lonely Mountain in the film version of the Hobbit? No. *applause* North of the equator? No.
JRRT? Yes, because the AOTC is indeed Mount Ngauruhoe, the volcano that was used to represent Mount Doom in the LotR films. Mount Ngauruhoe is a mere 25 km away as the Nazgûl flies (can you have just one Nazgûl?) from where I have been hanging out for the past few weeks. It's a spectacular mountain.
This AVMA was taking so long that I seriously considered just throwing the baton away when we were hiking near the mountain a week or so ago. But I'm glad I didn't, because now I can hand the baton over to Rack. Which I'm totally going to do. Only maybe just not yet.