I think you're ready to start Heroics. You got a couple greens, the bracers particularly are horrid, but other then that, it's looking pretty decent. I know you can still upgrade a few things with normal runs, but if you wanna try out some Heroics, go for it.
Shield and Shoulder: both can be upgraded in either Shadow Labyrinth or Botanica. Platinum Shield of the Valorous and Shoulderguards of the Bold from SL, or Aegis of the Sunbird and Spaulders of the Righteous from Bot.
Might look into the Felsteel Gloves even though you won't get the set bonus.
Shattered Halls for the ever elusive Figurine of the Colossus.
Bands of Syth would tide you over much better than your green bracers. It drops in Sethekk Halls. Not exactly tanking bracers, but honestly so much better than "Green Bracers of one Stat".
Leggings from KoT rep would be better as well.
Cheers, and gl ^^