The Aetheryte Earrings are also best in slot for Blue Mage, for what it's worth.
Aetheryte earring is -2int, -22 speed, -1 each armor type and +7 hit vs an augmented ironworks earring on a blue mage at 50. Thats still worse than an unaugmented ironworks earring.

It'll be BiS in a couple days until you get to 60 though.