Will mage hybrid class be useless?

We don't know almost anything about augments yet. Steven regularly uses the Fighter/Mage Teleport-Dash example, but beyond that, Intrepid has been keeping very quiet about the overall types of effects augmentation will have beyond things like elemental damage. Unfortunately, the answer is "No, we don't know", I think. I'd personally figure they'll come up with something useful, but we haven't seen it yet.

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Most definitely hope there is one.