Level 80 Thief Armor..
Buy a Masterwork set from the TP. Valkyrie/Knight/Carrion/Berserker sets won’t exceed 10s. Or wait for Level 400 Leatherworking and craft exotics.
This is how i went.
I bought Berserker’s Emblazoned (Coat, pants, etc) of the Berserker for my 6 armor slots (or inserted dungeon armor from Arah or CoF with the same stats) – power, precision, crit damage
Trinkets I mixed in valkyrie items (my crit was high enough, valkyrie gives power, crit damage, and vitality).
If you want power, precision, and crit damage then you wont be able to get any gear from karma vendors… they dont have those stats.
Importantly, I spec’d into acrobatics to get more vitality and mobility. I feel going the berserker route is too glass-cannon if you don’t work on vitality a little bit. I have 16.5k hp atm and will probably shoot a little higher.