Just a few additional ideas to toss onto the pile:

- Insert a spike into her belly button, carefully guiding it between her intestines without puncturing anything, past one side of her spine and out her back. Over the course of several days, keep taking out the spike and replacing it with a slightly larger one. Finally, replace it with a hollow metal tube just a little longer than the thickness of her torso so you can stick your arm all the way through.
- There's a medical procedure called an eye biopsy in which they stick a thin hollow needle into your eye to retrieve a small sample. Of course they normally paralyze your eye beforehand, but looking around with an acupuncture needle sticking out of your eyeball should be interesting.
- Very carefully pop both eyes out of their sockets, making sure not to break the optic nerve, and skewer both eyes with a single needle from side to side.
- Stick gradually bigger needles into her nipples from the front, i.e. straight into the breast meat, until she can fit a ball point pen (or even a finger) in there
- Insert thin straws into her fallopian tubes so Sai can blow directly on her ovaries.
- Not a needle, but still in keeping with the 'all the way through' idea: tie a couple dozen cords of anal beads in a row. Swallow. Wait until it comes out the other end. Pull cord back and forth.
- As you already mentioned: brain acupuncture. Drill tiny holes into her skull (which can be hidden by her hair to prevent anyone finding out) and stick needles into them. Prolapse skewering would be nice too.

Personally I would argue for keeping her alive, trying as hard as possible to keep her ever-expanding punctures hidden: long sleeves, baggy clothes, hats to hide the holes in her head, etc.