In order to be able to realiably rip the soul out of an otherwise healthy person, you need to come up with a way to do enough stress to take out your target in one attempt. Which sounds to me like a Thaumaturgy-at-the-speed-of-Evocation effect, which it turn would mean a sponsored magic power (simmilar to Kemmlerian Necromancy, but customized).
To reflect the unique quirkiness of the death, each level of bizarreness of the death should be considered a tag-able maneuver to be used in “Thaumaturgy-at-the-speed-of-Evocation effect”. The Sponsor magic could be something like Soulfire, but as the magic to release the soul from the body. As an effect, if the body does not die, the soul reattaches to the body.
As an example of a bizarre death for tangible maneuvers; a priest enters the confessional to start confessions while an alter-boy and girlfriend are getting it on. After a brief awkward back and forth, the priest realizes he doesn’t have an upset crying for their god young lady in need of saving, but a couple doing… well yea, he calls out in surprise and they kids bolt. He runs after to, not confront in anger but to help them in the way a good priest does. The scared boy knocks over a basin of baptismal water. The priest slips and bangs his head on a pew. Staggering after them he falls in a open floor hatch, somehow managing to get his head caught in a loop in the bell rope. Mercifully he dies instantly and the bell rings steadily as the grim reaper escorts the released soul to the light.
I count that as 7 maneuvers to be tagged.
For these maneuvers, I would make the player devise the death before hand. Put the work in the player’s hands, not the GM. If they start repeating death maneuvers, then start refusing the maneuver values. One thing I remember from the show was how bizarre the deaths were.