I am playing a mage that has a spell mastery of close to 130, and a hero with a lower spell mastery. Every time he cast shrink, the target doesn't resist, yet when i cast spells, it seems like it's 50/50 tossup whether of not the target resists. I know that it's just the luck of the roll, but can someone please clarify once and for all how to calculate the chance to resist a spell effect.
I believe it's like this: Spell caster has a mastery of 130, target has a mastery of 70, so in this example the target has a 40% chance to resists.
(130-70=60 --> 100-60=40%), and if my mastery increases to 140, the targets chance to resist is 30% 140-70=70 --> 100-70=30%
Is this the correct way to calculate it?
Thanks!