DH have been able to do some crazy things. Someone has already solo'd a +10 as DH this season, and in legion one did a +22 Court of Stars.
If they could pull off a +10 as a group mutlboxed. I think I'd have to play them lol. I did try both 4x DH + monk healer and it was decent. Their natural AoE damage on trash mobs is insane.