If their shields get nerfed more (Triune Ward Legendary, to be specific) they will be in trouble becuase then they will most likely not live long enough for a second burst setup if you pop defensive(s) for the first.
My issues with mages is they only need 2 seconds of their combustion to throw tripple FB/meteor/instant pyro which can kill you if you’re in a global cooldown lock.
With these nerfs mages will be a more viable target while giving a bit of a leeway to players trying to survive.
8% is a lot keep in mind, unholy lost 8-10% dmg after the PVE nerf and it’s unplayable right now.