Fire Emblem: The Sacred Stones/Chapter 6: Victims of War

It is recommended to get 'Torch' for Natasha and Moulder, as it helps a lot with expanding the view. Also, Colm will mention that he has a wider view range, so you can use him if you like, but for expanding the view, Natasha and Moulder with Torch is much better.

You can get 'Torch' from the Shop at the location which the Chapter 5 battle occurred.

If you feel confident, move to the right and stay there, trying to survive the slaughter-fest from all sides. Remember to send Vanessa (The Pegasus Knight) to the far right to kill the spider. It is recommended to kill the boss as early as possible.