How did you resolve the quests with the king/inquisitor/Waidwen? If the damage isn't the issue but the resources are, the regeneration of the glyphs and their blessings/damage would still probably allow you to auto her down eventually.
The only way I was able to solo that fight (trickster/ascendant -- obviously not same class but still solo PotD upscaled) was with their regenerating help and kiting her around the stage (Gipon Prudesco immunity to disengagement was immensely helpful for that). It was a bit cheesy because her pathing AI gets screwy around the narrow bridges and jumps to the different glyphs (Skaen, Ondra, Eothas), but I couldn't stand toe-to-toe with her throughout without running out of healing potions.
