Hahah that Vador meme is perfect. Don't say things like that SpookyGhost! =P

They should just make it to where the Parry value not only increases the Parry chance, but the amount of damage reduction as well.
Now this seems like a solid idea, maybe tough to balance at first? I like this though +1

Parry is:
Not Affected by Crit.
Not Affected by Str.
Not Affected by Vit.
Cannot Block Magic.

Thus, inferior to all other stats.

If Parry:
Critical Parry = x2 Reduction in damage.
Strength increased magic damage reduction from parries.
Vitality increased physical damage reduction from parries.
Magic can be parried, but at 10% rather then 20%.
Correct me if I'm wrong but does accuracy scale with strength? Does it block magic damage? I don't see why parry NEEDS to scale with anything you've listed here honestly. And parry blocking magic attacks?! WITCHCRAFT!