Out of curiosity, if i wanted to play all 3 specs but not have multiple bits of gear (aka only one set to cover all 3 specs), what would be the stat priority to aim for do you think? 
I dont do high end content.
Really i would just be questing as ww as well as heroic dungeons and lfr
Healing heroic dungeons and lfr
And tanking elites out in the world
Its hard to tell what to aim for when one specs best stat is another specs worst 
From what I’ve been told you can basically use the same gear for brew and windwalker
Vers>crit
And if you want to do mistweaver you’d use
Haste>crit
Crit+vers is also solid for me just not optimal.
verse>crit is probably a solid all rounder for every spec, obviously it’s not gonna be insane performance but it should be passable
I speak mostly for M+
With MW really anything with like 17-20% haste and then whatever secondaries you want for your particular build
Don’t understand why many FW promote haste so much (with Invoker’s at least ) as with Invoker’s Delight on a 1 minute CD, vers/crit is very strong since you get so much haste every 1 min but like I said prob want at least 17-20% haste for MW at min for smoothing things out outside of Invoker’s