I was testing a Perfect Plague Fire enchant and noticed that even 3 stacks (of 15% per) of -45% defense debuff was adding very little total damage.
On test dummies the damage was about a 7% increase. So I thought maybe it was because of arm pen, it wasn't working as designed anymore.
So my question is does arm pen make defense stripping enchantments like Terror, Plague Fire, Dread less useful or even approaching useless?
What is your take on it?