For healers, Dancer no question. They always had that kind of utility in other games for the most part.
For tanks, I wouldn't mind seeing Mystic Knight being a thing. Scimitar based weapons maybe, with the focus on elemental blades for their different stances tanking wise.
For DPS, anything using a new blunt type weapon. Its about time that Monk got a friend who can benefit from their Blunt Resistance Down to be quite honest (Also no thanks to Gunblade, we have too many sword users and someone who already uses guns we don't need a mixing of the two.)
