Me and my squad have personally killed 25 gorgons on hard. We've also found a few very far and elaborated places that were obviously made with intent for a box because there is a rectangular outline there. And when I say far and elaborate trust me. Also i believe after killing athion it doesn't end the game because it's not over, there is another area far far above the platform athion is on, it is there I believe the last box will be at, except I think you can only get it by completing the VOG on hard without anyone dying. Now that all my squad and I are LVL 32 and have 331 GHORNS, it was not hard to kill those gorgons, but we also didn't want to be wasteful on our heavy packs. Just remember IWHBYD was not easy to figure out the first time, and that was like 9 had ago so I'm sure this won't be easy either. Any ideas or theories out there that are legitimate and need real testing get with me, we got a very good group but we can always use other greats.