One thing to remember about the CNJ attack spells is that... They actually all give debuffs. Sure, nobody gives a cleyran's backside to them in current 1.0 but we can have hopes for debuffs in ARR, right?

Right now, Stone deals M.Eva Down, Stonera Slows, Aero has a DoT and Aerora has Dispel. Maybe those will be useful in the future and Water/Watera can carry their own useful debuffs.