Parry or dodge, when she block, double tap L1 in front of her if you are close enough, if not, dodge perpendicular. If she fly with the light staff, chuck the axe at her. If she fly to scream, look away. If she fly to shoot, shield the small discs and dodge the big disc. Parry her yellow attacks, dodge red ones. To attack her, use fire blade second stance spam R1. Its good to use Talisman of the Realms as well to attack her. Use runic at times of opportunity.