Just playing around with the idea of augment builds and this is one of the results of that thinking.
Not exactly practical but an interesting thing to do when you are bored and using a melee weapon with substandard damage (even with a full build).
Arcanes can be anything you want and [Enemy Radar] was included to maximize the potential of [Furious Javelin]. [Overextended] is used because for the build it is more important to hit enemies with the power to boost the melee weapon than doing damage with the ability.
This build doesn't really work on Umbra because his Tau polarity slots get in the way.