So I've just returned to the game recently after a short break but I've been wondering since I'm going to give Windwalker ago what is most useful to carry as an off-spec? I know I only have a choice between Tank or Healer but I can't help but wonder if its worth even carrying one?
Take tank, almost same stat prio (crit is better then haste for brewmaster after you get high enough energy regen) but you can easily tank old content with your gear.
It's definitely worth it to carry an offspec, for any DPS class.
I'm going to close this since this does kind of fall into "what class should I play" sort of thing - but, as just some advice, I'd check out the Brewmaster and Mistweaver guides, and then just see which spec you like other than Windwalker. Some people carry an offspec, some don't.
Oh, and Brewmasters use roughly the same gear, so there's also that.