Actually you have 76 of the magic and he has the 77th one. However there was another magi, heart that was kept a secret from everyone. Everything else is correct. Although alternating between Masamune and Flare every turn made him the hardest boss if you didn't have a proper battle plan.
The easiest way to execute a pre transformation kill is to use Excalibur and the two Gungnirs on three Robots, and max their STR stat with Sun/Dragon swords. Have Dad use the Psi Gun (or Flare) and Hecate boots. A mana maxed Human or Mutant with the second Psi Gun (or Flare) doesn't hurt either!