I would like to point out that, technically speaking, the WoL has already practiced necromancy in an unwitting fashion.

Dark Knight questline spoilers, natch:
Unlocking the Dark Knight Job requires interacting with the corpse of Fray Myste, and his sudden liveliness is the result of the WoL subconsciously manifesting their newfound power within his corpse so that "Fray" can act as a mentor figure. This ends up getting the WoL into trouble with the Temple Knights at the end of the 30-50 questline, culminating in "Fray" trying to kill everyone in Whitebrim Front and the WoL having to stop them.

The 60-70 questline also involves another manifestation of that power, "Myste", creating aetherial constructs of the recently deceased that behave more or less how their friends and family expected them to in life. "Myste" even uses this power against you in the level 70 quest, using multiple simulacrum to fight you in the same manner that a Necromancer would use skeletons, zombies, and so on.


That's not to say I think they're going to make a Job out of raising the dead. Accidental necromancy is one thing—making a living out of the living dead is another. I don't see us ever being able to willfully summon voidsent to do our bidding, either. But a Darkness-themed Healer would be a cool idea, I think. And maybe Chemist could be a ranged DPS, instead of a Healer like everyone is expecting. Potions do more than just heal, after all.