As Cappa said, the set can be mostly made from crafted Graymist pieces, however there are no wrists for that set.
Except for the helmet, It is also the Wildstrider ranger set that drops in Onyx and Atzel’s Fort (including wrists).
Also, the Wildstrider and Graymist shoulders are of different appearance, although you can’t see which model is used in the DT pic to which you refer.
The cape is Heavy Jovian cape from Crow’s nest.
The sword is T1/T2 guard sword, which DTs can buy from reliquary.
Unfortunately the awesome looking shield is the T3 crafted Mirror of Shadow.
Some alternate pieces to those mentioned above, that I know of are:
Chest: Griefscale harness (Sanctum)
Belt: pureblood girdle (Scorpion cave nm)
Boots: dominator’s boots (Scorpion cave nm)
Shoulders (Graymist model): utility shoulders (T2 quest reward)
Wrists: Fleshmender’s bracers (Crow’s Nest)
Gloves: bloodrune gauntlets (crafted), battleflight gauntlets (quest reward from Mairin in Atzel’s Approach)
I’m sure there are some other alternate pieces, but I can’t think of them right now.