Randy I trust this meets with your approval and that you don't take it as a slight upon your integrity but I seriously doubt that you are fully aware of the risks this undertaking is exposed to.
I think she has probably underestimated the guile of Jack. This is indeed a cunning and dastardly character who's nocturnal and nefarious activities sends shudders through the most hardened of police investigators, as for the local bobbies, well, don't expect them to contribute to the apprehension of the said villain, they all live in fear of him.
Madame witch is either grossly mis-informed or has probably overestimated her skills in dealing with such a miscreant. I truly fear for her wellbeing.
Due to my misgivings about the outcome of her quest I have contacted Dr Watson, who has reluctantly agreed to remain on standby throughout the night.
Inspector Lestrade's single-mindedness and refusal to monitor the movements of the witch, claiming that she is nothing more than a foolish woman on a fool's erroneous errand does nothing to quell the concern that I have.
Despite his disdain for Lestrade, Holmes proved himself to be, what others probably consider extremely uncooperative, aloof of the dilemma at hand.
So to summarise, she will be meandering the streets of Whitechapel, without any expectation or hope of anyone coming to her rescue in the unfortunate event of her falling prey to Jack.
Dr Watson will remain on standby at Baker Street. Lestrade has been informed of Watson's vigil and has agreed to send a constable with all haste to summons him if circumstances warrant it.
Beyond this, I am at a loss as to what can be done to safely extract her from the mission.

Her heart beat faster when she heard the muffled footsteps behind her in the fog. The woman picked up her pace, looking for a place in shadow, unlit by the street's bright gaslamps, for the coming combat. The monster London had named Jack the Ripper was stalking her, as she had hoped. The darkness inside her needed to be fed, and the powerful demon that possessed Jack would make a meal that would last her for many years.

Her hundredth birthday had come and gone, and still she had not proven herself by besting a demon, had not earned her place as a Wicked Witch. Tonight that would change. Tonight she would face her fear, overcome it, and earn the title of Dark Lady. Or die.

I'm on the edge of my seat. The tension is awful. Such a pretty lady and yet........
Sorry, I've got to go hide somewhere -- like out in the middle of the lake, listening to the Loons. It's calm out there and worry free.
I hope you understand Randy.
But let me repeat -- she's such a pretty lady. You haven't shown us a bad side.

Pierre

Her heart beat faster when she heard the muffled footsteps behind her in the fog. The woman picked up her pace, looking for a place in shadow, unlit by the street's bright gaslamps, for the coming combat. The monster London had named Jack the Ripper was stalking her, as she had hoped. The darkness inside her needed to be fed, and the powerful demon that possessed Jack would make a meal that would last her for many years.

Her hundredth birthday had come and gone, and still she had not proven herself by besting a demon, had not earned her place as a Wicked Witch. Tonight that would change. Tonight she would face her fear, overcome it, and earn the title of Dark Lady. Or die.