It's hard enough to write about just one crucifixion and make it interesting. I can't do it without making the crucifixion a part of a larger story, so there's some kind of action to fill in what would otherwise be very dull and repetitive.
Now, to my mind, the Lucilla personality who was condemned to be crucified twelve times and then was dragged off to be put on a cross might well have been the typical cowering, terrified victim, humiliated before the crowd as she was roped to her cross and lifted up naked. By the sixth time, when Sabina encounters her, she is the angry, dangerous woman who knows exactly what crucifixion is like. Her personality should continue to evolve over the period of time that she is repeatedly subjected to crucifixion in various forms. There's a story there, but not yet sure how it goes.