Are you sure about getting less crystals and runes on impossible? And here I thought less gold, stronger enemies, less rage increase in combat and slower growth of rage spirits' experience was punishment enough.
Not counting on buying them in Bogacho and rewards for selling the map to Elven Queen, there are at least 400 Crystals and 200 Magic Runes on Impossible so you can have a rough idea on what you are going to expect.
If you check out the Post your high scores here thread, you can see that people who played on impossible collected pretty much the same amount of runes as those who played on any other difficulty. So that's good.
And here I thought less gold, stronger enemies, less rage increase in combat and slower growth of rage spirits' experience was punishment enough. 
Hybrid Mode
