Why does the paladin defensive skills have such a high cooldown?

[YitharV2]

I'm not very good at math so I was wondering if cooldowns used by PLD/DRk were stronger than WAR because they get combined with the 20% tank stance bonus?

WARs tank stance only counts when the health is above the 100% mark. After that, A WAR in Defiance that casts Rampart will get the same reduction as a WAR in deliverance that casts Rampart. I think?

Cooldowns lose their effectiveness as you stack them. Cooldowns are multiplicative. That's why you don't want normally to use Rampart and Vengeance together. Although it can be helpful on trash.

You're looking at it the wrong way. Warrior's tank stance gives more HP and a healing bonus. Assuming a Scholar isn't healing the Warrior, Warrior has the same effective HP as Dark Knight or Paladin. In that sense, Rampart is probably slightly stronger on a Warrior, since Rampart doesn't stack multiplicatively with the stance like the others.