I've got a ton of alts already on my plate, so I'm not sure how reliably active I'd be, but I might be more interested if this was maybe a bi-weekly thing.

Though I'd switch Water to a Defender or Blaster (Energy Blast's effects have often been described as water-based powers by RPers), Earth to a Tanker or Controller (as they get Earth-based powers), and Fire to a Blaster or Tanker (ditto).