I've digested the various takes on Jade Court from this and other threads, and it comes down to six variants:
Hungry Ghosts, Simple: disembodied soul-eaters that swap bodies and consume the lifeforce at an accelerated rate
Hungry Ghost, Eldritch: ritual body-swappers that rely on phylacteries and command a very secretive organization
Magic-Eaters: corporeal humanoids who feed on magical energy from spellcasters and magical creatures
Naga: human-snake hybrids presumably with magical powers
Penanggalan: corporeal humanoids whose heads sprout wings and detach from the body at night (usually female)
Jiang Shi: mindless hopping, breath-stealing zombies
I could see setting up the Penanggalan and the Jiang Shi as the "Renfields" of the Jade Court: females who were half-turned by the Jade Court becoming monstrously long-tongued flying heads, and males becoming hopping zombies. There could probably be some Yin/Yang justification made; also, for the sake of gender equality, one could instead determine that the Jiang Shi are the lower-level thug zombies of the Jade Court, with the Penanggalan serving as higher-level Renfields, rather than divided along gender lines.
As for the full Jade Court, I would probably go with the magic-eaters: they remain similar to the White Court in general makeup, and their magic-eating provides a brand-new set of challenges for the players.
Also, I'm not sure how crazy the author would get with the Jade Court were he ever to flesh it out in a book: my impression is that they would possess trappings and behaviors appropriate to their culture of origin, but remain somewhat Western in abstract morphology and function. He would stake out a vampiric role outside of the better-known vampire courts, perhaps along magical or intellectual lines. Possibly a great reverence for and/or reliance upon ancestor spirits.
