This has changed a lot since I created Loren. She used to wear exclusively light armor, as she was a thief/assassin in the beginning. When I leveled up more, I started getting into Daedric armor.
But now that she's defeated every dragon priest in Tamriel, she's decided to remake the dragon cult, but on her own terms. She wears Miraak's robes, gloves, and boots, along with various dragon priest masks (smithed up to insane levels, to compensate for the lack of armor in the robes).
The way I see it, she's Dragonborn. She's defeated every dragon priest, and claimed their masks. She's the most powerful dragon priest in Tamriellic history, and I play and dress her appropriately.