These guys make an excellent pack mule in Genesis DlC official (No flying). I've spawned back to base with over 7000 obsidian for you CP needs. Also make a great defense against predators while you collect your materials.
Update on these Brutes, in Genesis DLC, these guys collect fibre, crystal, stone, thatch, rare mushrooms, and wood! Head to Lunar biome and collect all the materials you need. Use there weight to hold your crafted items!