RoS Heroic Combat Mitigation reduction

Combat Mitigation has been reduced for base population, bosses, and adds for all [Heroic] and [Expert] zones, Vex Thal: Den of Shadows [Heroic I], Savage Weald: Backwoods Brawl [Challenge], and Vex Thal: Edge of Oscuris [Challenge].

The Vex Thal: Edge of Oscuris [Challenge] reduction is a further reduction from that of the 27th update.