Big Bang vs Almagest

Big Bang, because it was both non-elemental and was always launched within 2-3 turns of my party members attacks. Honestly, it always had the chance to wipe you out the second time around. [The damage would often double after the first release.] A lot of times it would take out Rydia, and nearly wipe out Edge. Cecil often times had to use White Magic just to keep Rosa, Edge, or himself from dying. So Big Bang is the bigger damage dealer even against a larger party than 5. What's even more alarming is that if you're inexperienced with the Original Final Fantasy IV, and make the mistake of casting Holy, or Meteor, after Big Bang, Zeromus would counter with Mealstrom and take out your party because of the Psyche Status.