[SpaceShibe]

Simple change and buff that would legitimately make this worth being a main class skill:

Change it so it applies on changing to Reaver stance, that's it. It can keep the 1 round duration.

Demon Hunter as it stands has no reason to be main classed. It's soldier Main Class skills doesn't further it's style like it does with Black Knight(Tactician is more supportive of a class, so I don't count it. Especially since it also has interaction with Black Knight via Grandmaster).

I think something as simple as gaining an elemental enchant on Reaver wouldn't be the end all be all. You're already spending 2 SPs(1 if you can afford the skill slot) in a SP heavy class for this.

Edit: I'd also like to note that the enchant is level 1, and doesn't trigger if you have a badge on. I think it'd add to the power of a main class skill a bit more if it could trigger with a badge or an enchant active, to switch between elements. Or for the enchant to be higher than level 1.