Most of the time I just need to bounce ideas of other people rather than talking to myself, it's amazing that even without the other person suggesting ideas I can just suggest ideas and by getting feedback I'm just a lot more open minded. 

In terms of the idea it sounds promising! I always like the idea of lost artifacts of the gods and such as I really enjoy Greek Mythology. The questions I would ask would be...

1. Who made the book that lists where all the items were? it in itself wouldn't be one of the items so it either means that man found these items and in an attempt to either trap the gods on earth or hide their location for safe keeping. It would also be a cool line for a Villain, someone who gives this adventurer the book to get his help in finding them, then once they are found he turns out to be evil and uses the items to do something like kill the gods or become a god etc etc

2. Whilst I like some aspects of Gods coming down to earth and being mortal, I have always preferred the gods to seem untouchable, unimaginable power and so forth. It just makes them seem more bad-ass and makes more sense as to why people would still believe in them. Which leads me to the idea that each of these gods would either elect a Champion or use the powers they have to send monsters/obstacles for the adventurer to try and stop him from getting the artifacts. 

3. did you intend it for modern day? The treasure hunter being in modern times and the story of the lost items was an old old tale that hardly anyone had ever heard, or do you mean something like upon hearing this legend a treasure-hunter or mercenary of the time decided to try and hunt them down before the gods themselves can reclaim them?