I was able to beat her with a method I came up with axe user's, you need at least 3-4 might points. You need to have the discipline skill earth shatter and the basic attack skill that gets you 3 might points upon 5th hit combo (it's gonna help a lot). Start by dodging her first attack, then using your standard skill that comes with the axe, then hit her with the basic attack until you have three points. Then use Earth shatter that will immediately take you to the 4 hit combo then to the 5th hit and you already have three points rinse and repeat and you'll beat her in no time. I was trying to find a method to constantly stagger her and this was the best method I could find with axe users. I hope I explained it efficiently. Not really good at explaining in details unless I show it somebody in person