If you plan to raid with that priest I would vote inscription and alchemy. Inscription so you dont have to do rep daillies in deepholm to get your shoulder enchant and Alchemy for the increased Flask duration. Plus alchemy produced a great entry level trinket and Inscription produces the amazing Darkmoon Cards.
Tailoring & Alchemy seems good for holy priest . The enchant of cloak in great , Flying Carpet looks very cool and imo alchemist stone always good to healers.