HBO green lights "A Game of Thrones"
So it's R'hllor that wanted to save Davos though a lie told to Melisandre. He is Lord of Light and Lies then.
[video=youtube;w3QW8PVyyNM]https://www.youtube.com/watch?v=w3QW8PVyyNM[/video]
Aah... You're assuming Mel only sees visions related to the Iron Throne. Fact is, her visions are all about The Great Other... A global threat. She's already convinced Stannis to help the Wall rather than fight for the throne, and Davos can help. Mel believes what she sees in the flames and other than misinterpreting a couple of the visions ("Shows me only Snow") she's usually right.
PS. Can't wait for the series to get to AA and TPTWP so we can all get busy speculating.
PPS. Mel is one of my favorite characters in the books.