Hmmm. Whatever happens, don't forget the sword fights. I mean, this might sound like an obvious suggestion but getting good sword fights down is what will make this an epic 'sword and sandal' mythological piece. Then, the conventional catfighting can occur after blades (and words) have failed.
For reference, I'm reminded of my commission awhile back featuring Red Sonja.
....Otherwise, this topic gives me an idea for a future set of stories that I'll have to talk to you about later.