Skill Speed x Parry

[Sephirah]

VIT is more important for PLD than it is for WAR due to WAR having higher HP by default, but it is still important for WAR. The jury is still out on if Skill Speed is worth it or not right now, if it reduces the GCD enough then yes, I think it will be much better than parry, but at this time I'm unsure.

[Faction]

VIT is more important for PLD than it is for WAR due to WAR having higher HP by default

what

When you have a scaling percentage health buff, vitality INCREASES in value.

[Kitru]

When you have a scaling percentage health buff, vitality INCREASES in value.

Only if you look at max hp. The 20% damage reduction acts as a 25% value multiplier on any given quantity of additional hit points. As a question of effective hit points, the contributions of a given amount of vitality are going to be identical for the two (25% max hp = 20% DR, for eHP).