Once tamed an Arthropluera can be used as a great base defense if hidden inside your base and set on "turret mode" it will instantly shoot acid at the people raiding destroying any armor they had on them. As most people do not know that you can use the Arthropluera like that they won't be ready for a surprise acid ball to the chest.
How to get insane loot!
Step 1. Tame arthropleura
Step 2. Run cave of the strong (NOTHING will attack you)
Step 3. Tribute and repeat steps for infinite resources
BONUS: use industrial grinder for Insane resources