【Arknights】 HS-EX-4 Challenge Mode Low Rarity Guide

I wish you could farm this stage for materials, it's very quick with Blaze, Exu and Saria.

thanx

Thanks for the guide!

This is so solid

Operator Replacement Suggestions (ORS):
Midnight: Any Lord.
Beagle: Any Protector.
Popular: Any Centurion.
Melantha: Any Dreadnought.
Kroos: Any Marksman Sniper.
Perfumer: Any Multi-Target Medic. E2 not required.