From Dark and Darker Wiki
Numbers between Magical Resistance chart and in game (Magic Resist Rating) doesn't match
A nude Fighter has 15 will which equals to 30 Magic Rating, which equals to 7,8 Magic Resis OK
But
A nude Druid has 18 will, looking at the chart this should be equal to 30 + (from 15 to 33: 4 each) 3 X 4 = 12 --> 42 Magic Resist Rating which would be equal to (33 magic resis bottom segment) 9% + (from 33 to 53: 0,3 each) 9 X 0,3 = 11,7% Magic Resis
However in game a nude Druid is displayed with 52 Magic Rating and 14,7% Magic Resis (A player with 52 magic resis does actually adds up to 14,7 magic resis, so it is the will conversion which is different in the chart)