Originally Posted by
Taninsam
Well, "+20%" is the opposite of fixed. It's not like the perk adds "9000 frost damage" to howling blast. That would be fixed.
As long as Obliterate possesses enough value as an ability, having it use an Unholy rune is very useful at higher levels of haste since you'll be using one less GCD to dump that rune. When you are GCD capped, every GCD used on low or non-damaging abilities is a dps loss.
Anyway, it's way too early to start thinking about ilvl800, so for now I'd just focus on 6.0 and t17.