If you're having trouble, save your progress frequently, as often as each time you defeat a Guardian without suffering unacceptable losses. However, the distance tends to be awkward, so parries are harder to perform than usual and you may take damage and break shields. It can shelter you so that you have time to target a single Guardian at once, with your ancient arrows, or by deflecting their shots with a well-time shield parry. Use the available rubble to your advantage.
