The Goddess of Light Luminaria saw every bit of destruction that her proud angel army was experiencing. Each loss was a great hindrance to her grand plan, but she did not bat an eye when the angels are killed. Her pawns that she created were a necessary sacrifice for the great plan she has thought of.
Even when the Angel of Righteousness Zadkiel was killed, she did not exert any effort in extracting her soul to her divine realm. If she caught the soul of Zadkiel, then she would lose a moderate amount of divine energy for transforming her angel soul to one filled with divine energy. She must not lose any divine energy now when her plan is about to come into fruition.