I Just have to make more staffs and wands.
The draconic staff doesn't do it because of the shield?
No, becuase of how the Embermages Abilities works, they dont really increase in damage with %weapon DPS, so utility of weapons becomes more important, such as +cast speed, +focus, +proc things etc.
One important cause is also that 1 of the main abilities is not effected by +cast speed, which makes it complete trash. Embermages abilities does mostly flat damage, which doesnt use %Weapon DPS, so really, a 3k DPS staff would not be better than Brimstone Mace at this point.
There ARE ofc abilities that uses %weapon DPS in the Embermakes skill-trees, but they are not good enough to outweight the flat damage abilities, which makes Utility better for a weapon on the Embermage.