Whats the correct path for the ruins with and without emma?
Centre, Left, Centre, Right, Left. On Angela's route you can't save Taylor, and on Emma's route you can't save Angela.
Not sure if you're meant to be able to save Angela on Emma's route, though. No matter what exit I choose she appears in the final chamber, and her dialogue is the same as greeting her outside the ruins even if you wait for the question mark to pop up.