Bring loads of thatch foundations , after clearing a Room put some on the spawns,repeat this on ALL the floors and corridors , It Will help in the next time to get the artifact(mobile),blocking all the spawns, you can even make a base here, It its Very safe, but remember, tame a Scorpion here then use It to tame a araneo, you cant enter ant other caves i can remember with the scorpion for invisibility(mobile), remember from the base i said? Tou can even Farm metal, Crystal and obsidiana if you don't block their spawns and have an clear access tô drops and the artifact if those don't blocked , also WATER, you don't need a 457282891 kilometers plumbing.

Drops:

10X balm

Hide Armour BPS

Metal pick and hatchet BPS

Fishing Rod

Amber

(Those are the ones i remember, maybe Wooden Shields BPS or already crafted)