Parry: How would you improve it?

[ashwich]

I'd rather see them drop parry in favor of a counter system. One where the damage countered is based on your determination. Give it a short cool down like blood letter for bards and have it be a proc until it's recast is naturally hit.

For flavor make it also increase enmity so that off tanks have to be cognizant of how they use it.

I'd rather tanking be more reactionary and fluid than what it is now. Hell I'd rather see +enmity and/or +might(def and mdef) than parry.

It can be argued we will never need that 20% mitigation. That's what our cool downs are for.

This is an interesting point, I'm a fan of active mitigation. give tanks more control on how to reduce incoming damage.
incidentally my least favorite stats is crit, even as a dps. distinction between a good dps and mediocre one should be how they manage their cooldown, how to minimize downtime and optimal rotation, not some magical chance in the air.