**Use the baskets**
I soloed this without fighting as a Mage ilvl 795.
Scout out the area in advance and find the baskets while in disguise - over the bridge, through the arch, there is a basket on your left, across the courtyard there is another basket, just to the left of the second bridge.
Start the quest, go outside, mount up and go ahead of her across the bridge; when she gets to the top of the bridge, aggro starts; go through the arch, turn left and jump in the basket. You can then re-apply the disguise, heal and then appear out of the basket, mount up and go back to her, she will start moving again. She will moan if you are not keeping up with her.
Go through the crowd of mobs in disguise, she will cause aggro again; just before the next bridge; be ready and jump into the basket just left of the bridge. Re-apply the disguise and heal, emerge from the basket again. Follow her onto the bridge and she will complete when at the top of the bridge.
Job done and no mates needed!