Counting parry as a disadvantage when a pld have block rate and it is higher than parry rate is nonsense.

Sheltron is 20% because it is no longer one time hit CD, it block everything within duration of 6 seconds, and giving pld a 30% dmg reduction skill for 6 second duration would not be balanced.
It is not supposed to be a better skill than any of the equivalent, it has only 5 sec cooldown and requires gauge for a reason, it is still much better than war raw intuition because sheltron does not share a CD with any other skill, raw intuition does.
And PLD invulv CD useless, is this a bait? xD