 Basically for binary spells, which are things like fear things like frost bolt things that apply debuff and aren't just raw damage It's actually quite simple when we break it down They have their hit roll and their resistance roll, which comes from you know shadow res frost res whatever they're combined into one roll So as a result of that talents like shadow focus which apply more hit to your character are able to reduce the Resist chance due to resistances of that role So something like fear can be made to hit more often on somebody with say 40 shadow res Using the additional hit from this or just hit on gear and the calculation from that is here Which is basically just saying that resistance score, which is the resistance amount on your gear divided by the resistance cap This is will be 125 and then you multiply it by your base hit chance and PvP that is 0.96 And then you add in your spell hit bonus, which is going to be this number here plus whatever hits on gear And that is going to give you your final hit amount