Opaque Sapphire of Bulwark  

 

The best camp for this I could come up with has five potential drops per spawn rotation. The Large temple to the west has three small temples around it marked Raid on Goods and Brewalls maps. At the top of the stairs leading into the mini temples is a Hexxt Markmaker spawns. All three have one in the same spots. Also if you look east from the west mini temple you will see a goat person under a tent shelter. That is a PH for the Pixtt Battlestrategist. Finally if you go down the gorge to the east there is a small temple. On the outside to the east of the north stairs isn the place holder for the Hexxt Spiritpillager.

They are all marked on Goods map. Even popping these five every rotation it took me a good while to get this.