Pulled from the newest IGN Video, D2: Perfecting the Sounds of the Sequel. The attack, which is somewhat similar to the bolt caster or Dawn Blade, is seen at the very end of the video. The Hunter launches a bolt of arc energy, but misses the enemy Guardian. https://youtu.be/9TXj5z9h_7Y
...not to mention the fact that ArcStrider also possess the ability to perform some type of ground slam akin to the Fist of Havoc.