Hi Rokta.
The ratio's are correct (for as far as i know).
Consider yourself lucky to hit granite every time.
I know some people who would like to be in your shoes.
Cheers TJ
(@ SillYcoNe: lootspot value ranges may be added in the future, but i can't promise when)
(After a good think, i decided to not add loostspot values, this becuzz they change with the market and special quests. However it would be a nice idea for a separate topic!)