Lightning based summons in order of my preference.

  1. Adrammelech - awesome, but unlikely since no other Ivalice summons exist in the game (yet)
  2. Quezacotl - the stylish Ramuh replacement in FFVIII
  3. Ixion - FFX, FFXI
  4. Ramuh - The classic thunder summon who is the most likely to be in the game.. and is my least favorite of the classic summons.