Was there an option not to kill Saskia? I don't remember exactly what the events of the end of my game were. I remember going to save Triss(by the way, just to start an argument, Triss or Yennefer?), then I believe I went to stop some sorcerer, though I forget who it was. Was that Philipa? I really can't remember, though I remember (spoiler) letting them rip themselves apart with a spell gone wrong. That culminated in a tower-top battle with dragon-form Saskia, who was still unfortunately under Philipa's control.