I have done some testing and hopefully this will help people.
Difficulty Offset 1 Override Official Difficulty 1 Max Dino Level 30 Difficulty Offset 1 Override Official Difficulty 1.3 Max Dino Level 39 Difficulty Offset 1 Override Official Difficulty 1.4 Max Dino Level 42 Difficulty Offset 1 Override Official Difficulty 3.0 Max Dino Level 90 Difficulty Offset 1 Override Official Difficulty 5.0 Max Dino Level 150 Difficulty Offset 1 Override Official Difficulty 10.0 Max Dino Level 300
So in short 3 dino levels per .1 increase using the Override Official Difficulty. This was tested on a Ragnarok Server.