for example, if two people are both 50 in illusion, one with 200 fatigue, one with 300, and they both have max fatigue, will they have the same chance at casting the spell or will the one with 300 have the higher chance? also, if the one with 300 max only has 200 when he casts the spell, do they have the same chance or the does the person with max of 300 but only 200 at that time have a worse chance?