I think lots of nerfs wouldn't be needed or demanded, if defense would have the same probabilities like offense.
F.e.
Wrath on defense deletes almost every time all beneficial effects. I'm happy if my wrath on offense deletes 1 or 2.
Same with SSD on defense. SSD taunts almost whole team everytime, while my SSD on offense taunts only 1 or 2.
NF never answered why they give the artificial dumbness this advantage or how high it is.
(Try to fight your defense on auto with defense team = offense team. Should be 50/50, but it isn't).