Why Avoid Parry?

[Risvertasashi]

Basically... let's say you go all parry. If you can get a piece for a slot with parry, you get it, wear it, use it.

To notice the difference, you have to do some hard core stat crunching. Recording encounter after encounter until you have a ton of data points to compare against your previous build. Only then will you notice a very slight difference.

Without the help of said programs/crunching, you'll never notice any gain from stacking the parry stat. Your healers won't notice. That's why people call it a terrible stat.

Same applies to block for PLDs.