Since I had all the pieces lying around, I put together the Vampirella outfit and the Absorb Health spells she uses, cleaned up the details, and published it on the Nexus.

Vampirella 1.0

I've used it on each of the human races so far, and I might try an elf or beast race next.

I'm putting together a "Serana is Vampirella" mod for Halloween, and am currently testing it in Oldrim. Since I already published her outfit for LE only, I'll likely port this up to SE and put it on the Nexus for that edition only. Not intending any XBox release, as that's too much of a support problem with no LOOT or console commands.

Serana's lower weight means she looks less likely to burst out of the outfit. It would stay in place without help, and she doesn't feel any lack of support. At the moment, she's carrying around an Elder Scroll, and you wonder what it's hanging on, but that won't last long.

Pictures soon.