So where does this leave Bladeward in Wrath?
Not sure it's very good.
A lot of this is based off of hearing that Bladeward has been nerfed above level 80, so either it's proc chance or its proc isn't all that high at 85.
Both have some discussion on it - it looks like above 2 stacks (400 rating) isn't very common, which would be something less than 2% parry after diminishing returns. <2% parry and a 20% uptime makes it average less than .4% parry average.
Mending is meh. Weapon Chain is meh. Honestly, if it's not windwalk...
I would suggest running the TB dailies for 6 days, that will give you more than enough gold to buy the mats (and maybe a few greens to DE so you don't need to buy the celestial essences if you know a friendly enchanter) to get windwalk.
I think bladeward does merit a revist - but I think the reality is the nerf to proc rate above level 80 and the level of DR players are looking at for parry makes it not very good.
I would still go Windwalk > mending >= weapon chain