So 3 questions
- Whats the best chest tier
- How do you build a cave base (Using the South Mine in my case)
- Best lighting item?
1. Rainbow Chest. 40 inventory spaces. Craft from the Pretty Workbench.
Actual best "container" is the Heart Closet though. 50 inventory spaces and much cheaper to craft. Though the closet isn't technically a "chest" and has collision unlike the Rainbow Chest.
2. Just build like usual. Need more lights though. And guards to deal with mob spawns, or stairs/platforms to build up higher to avoid them., Oh and if the raid target is inside a cave, the raid will just fail to start outright. This might or might not be desirable.
3. Moonlight Lamp. Craft from Cassie, a unique NPC you "rescue" from the Laboratory.
The Moonlight Lamp is expensive to craft though and requires a Core (drop from Ruins Level 5 golem boss) for each lamp. You might be better served by just spamming regular standing Torches as a cost-effective option.