Area Defense Jingyu Valley Level 2 Guide for the Early Warning Terminal in Arknights: Endfield. See strategies for Auto Defense, Operator Intervention, and facilities to use.
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Jingyu Valley Level 2 Auto-Defense Guide
- Clearable with HE Grenade Towers and Marsh Gas Mk-1
- 2 HE Grenade Towers and 1 Marsh Gas Recommended
- Place Facilities at the Intersection
- The Boss Creates an Enhancement Field
Clearable with HE Grenade Towers and Marsh Gas Mk-1

For Auto-Defense, you can clear this stage with a combination of the "Marsh Gas MK-I" and "HE Grenade Towers," which can be manufactured in Wuling. These are unlocked by progressing Wuling's AIC Plan, so explore Wuling first to gather Industrial Points.
2 HE Grenade Towers and 1 Marsh Gas

The strategy of slowing enemies with Marsh Gas and attacking them in groups with HE Grenade Towers is powerful, so it's highly recommended to place a set of 2 HE Grenade Towers 1 Marsh Gas at each point. Place the remaining two HE Grenade Towers near the Command Core.
Place Facilities at the Intersection

By placing multiple facilities where enemies merge, you can attack several enemies at once. Since this stage has only one Command Core, placing them at multiple intersections allows you to deal damage efficiently.
The Boss Creates an Enhancement Field

The boss, "Tidalklast," periodically creates an area that increases the speed and Defense of other enemies. If it's created near the Command Core, your defenses will be broken through, so defeat it before it gets close.
Jingyu Valley Level 2 Manual Intervention Guide
- Place 3 Sets of 2 HE Grenade Towers 1 Marsh Gas
- Stalling with Solidification using Character Skills is Effective
Place 3 Sets of 2 HE Grenade Towers 1 Marsh Gas

In Manual Intervention, it's recommended to place three sets of two "HE Grenade Towers" and one "Marsh Gas Mk-I".Since the combat facilities can defeat most enemies on their own, your characters should fight near the Command Core and defeat any enemies that slip through.
Use Solidification Effect with Character Skills
For regular enemies (non-bosses), you can stall them for longer by inflicting Solidification with character skills. In this stage, you can stop enemies with increased movement speed. If your characters are well-developed, try using a Solidification team composition.