Name of the spell: Dark Apotheosis   
Link: http://wow.gamepedia.com/Dark_Apotheosis   
Issue with the spell:    
A: Your physical damage reduction in Dark Apotheosis should scale with your mastery like the tooltip says, but instead, the buff only says "Physical damage reduced by 10%", but its not. My percentage on tooltip was 23.50% and tooltip should say that.    
B: When I pop dark soul, I should get more damage reduction in dark apotheosis, but I dont, since it doesn't work.   
How it should be:   
A: The buff should be applied correctly.   
B: Should scale with Dark Soul mastery buff.   
Realm: Fun/X100   
Priority: 7/10 = Very Important for demo warlocks vs melee classes. It is literally life savior in alot of cases.