I'd bought her the heirloom bow, but somehow it didn't seem to fit the bill. Then one day while running dailies on my frost DK, I looted Valanos' Longbow, and the seed of an idea was planted - this would be the centerpiece of Lenore's transmog set.
As my DK was also a blacksmith I crafted a Fel Iron Chain Tunic, and combined that with a couple leftover quest items (Gloves of Marshmanship and Hearty Cenarion Cincture).
I found several more on the AH for cheap (Unyielding Spaulders, Soldier's Leggings, Jazeraint Boots), and bought an Ethereum Phase-Spear from an NPC vendor, but something more was needed.
Although the mail chest had the nice overlapping green plating I wanted, it was also rather skimpy, so I ran BRD until Master Builder's Shirt dropped - it took a while but as it was the only shirt in the right color, it was worth it.
The final touch was the Purple Trophy Tabard of the Illidari; an obscure quest reward from SMV, this really tied it all together for me.
Demon hunter...
Born to be bad...
Posing with Nevermore and her cat familiar Spook...
Defend the target dummy at all costs...