They pretty much have it all. Detect hidden/invis. Healing. Concealment. Good tankiness. Good maledicts. Good lag. They even get dam redux through martial trance. Go arial, and the only preps you'll truly need are recall/teleport potions.

Easy to solo-level, because they have a good balance of offense and defense. Always have an opportunity in PKs due to hide/sneak and multiple lag/maledict options. From lvl 11-51 they're solid-to-excellent on the PvP and PvE fronts, so you'll never hit a lull where you're getting constantly chased around or are stuck when no one is online in range.