If resetting your gambits doesn't help, you may be under-leveled. Also, your weapons may be behind the times, as with every new area to enter better weapons are available for discovery or purchase. When I first played this game I got stuck at the Stillshrine of Miriam because my character levels were too low, so I took a break to bring them all up by five levels. Somehow I managed to increase each of their levels by 7-10, so when I returned to the fight my character's stats were more than enough to defeat this area. So, you may just have to take a training break. Unfortunately, the embroidered tippet is not available at this stage of game, as this is my favorite accessory.

I also second the idea of lowering your cura gambit to a lower percentage(like 40%).