Lady Liadrin

If you break the gates down and Lady Liadrin is nowhere to be found, go to the center of the horde fort, just beneath the blue circle on the map where she's supposed to be, then look up.

No one could hit her from the ground. However, if you're looking in the direction from the main entrance to toward the back of the fort, there is a tower to the right of where she's floating. The tower has a fence all the way around it and if you go into right-side entrance of this tower and go onto the back "porch" you can get on the fence and make your way around to the front. From there you can get onto some spikes jutting from the tower.

As a paladin I had no spell that could reach her from there, but a ranged class (not sure which) was able to hit her, at which point she dropped down and engaged the group, and we completed the warfront.

Note that once you hit her you should get of the tower or she may charge to you on the tower and begin evading.

If you annoy her (i.e. clicking on her a lot), she says any of the following:

I don't have time for mind games.

I'm not the "touchy-feely" type.

Really? Really? We're still doing this?

You are so not receiving a card for Winter's Veil this year.

:3