We really should be able to glamour other jobs' sets

[Deveryn]

Fair game you say ? Can you show me where have you seen DRG, RPR, DRK and BLM use hammers ?

DRG and DRK both have other weapons in the game with a blunt appearance. I'm not sure of the names, but they exist. All the tanks have a knobbed / spiky blunt weapon. Here's one DRK blunt (apology accepted)

For BLM it's more of a staff than an actual hammer, so there's really nothing wrong with that. The same goes for WHM.

Reaper seems a little odd, but if it fits the animations, then I don't see a problem there either.