Right now, my first reaction, I like the second one best. There is something about its composition, that feels right, even though I can't say what it is.
The third one (with second woman) is an nice idea. To me it would appeal most if the woman on the cross were looking in to the eyes of the spectator, making a connection between them. And if the spectator were clothed, emphasizing the exposed nudity of the victim.
In the fourth one, the additional cross and stake give a quite different effect, making the victim more dehumanized ("just another slave being punished") compared to the second one where she might be a glorious sacrifice to a demanding goddess.
Thank you for giving us this chance to explore different presentations of your artistic vision.