I disagree with him simply because i feel "Effective" HP for duelling and PVP is different.
Things that need to be discounted from the normal EHP formula for duelling:
1)Block chance.(Completely discounted) block amount is too low to matter in PvP
2) dodge because of its inconsistency and sporadic use.
3) Reduced damage from melee attacks (since it only applies to phys damage.)
4) Reduced damage from ranged attacks ((since it only applies to phys damage.)
5) Reduced damage from elites ( PvP is about burst dmg and skill and movememnt) if you keep dodging and playing smart you'll be fine especially against ranged classes. That 7% wont help at all if a WD catches u with haunt/hex or a 400 unbuffed DH gets a few hits off on you)
SnB barbs are realizing this now the most.
Things to be given more importance:
2)All res ( simply because of its consistency and reliability)