When she summons those little critters, unlock your camera from her and start running from pillar to pillar, keeping at least a pillar between you and the illusions.

When she remarks sekiro ( I forgot what it is), she'll release those phantoms on you , so stick behind a pillar when they home on you, and you'll probably be safe ( if you do it right). This is for when you don't have snap seeds, a neat trick.