I couldn't finish 'em. Looks like this's gonna get complicated.
Zack should have a high Vitality rating to withstand G Ptolomea's attacks. Graviga is good for depleting its HP, continued with a sequence of Costly Punch. Inflicting Poison on the Genesis Copy will be helpful too.
Inferno. It is where traitors to their guests are punished. This, and other enemies that are named from the Ninth Circle, are references to Genesis's betrayals. He betrays his guests by attacking Zack Fair and Tseng when they find him in Banora.Ptolomea is the name of the third round of the Ninth Circle of Hell in Dante's