I have a thought of how the tale could end thoroughly weirdly.
Spare one or even two of the girls the cross as you get to like one/two of them and change the crucifixion ordeal to another ordeal as you think that she/they have not truly earned to be crucified. But she/they do not at all want that! She/they say that they want to bear the cross alltogether or nobody while they point out that they have earned the doom. As they think that you might order them to crucify each other, they put forward themselves that they crucify each other, but are allowed to choose who will be crucified together on one cross, the kind of crucifixion and where the crosses will stand. For the sake to spare them the downgrading by being stripped, they strip themselves before you can let others do this. The last girl to be crucified will be drawn by lot.
Alex