I am not sure how damage reduction works to be honest. I give you a few scenarios, in all of them the Mob uses an attack that does 100 damage then applies a bleed of 100 damage over 10 seconds.
- I use Pulverize before getting hit and the mob deals 35% less damage to me. Do I take 65 and 65 over 10 seconds?
- I use Pulverize after getting hit, not before. The mob clearly deals 100, but does the bleed get reduced?
- I use Barkskin and it has 5 seconds left at the moment of attack. I should take 80 dmg and then what happens? Do I take 5 seconds of reduced bleed then full bleed?
- I use Barkskin after the attack, does the bleed get reduced?
Honestly… I feel like an idiot for asking these after tanking +15s and crap, but it really started to bug me and maybe it helps me improve.