So these guys are the absolute KINGS when it comes to gathering metal, not only do they gather it in the hundreds from every metal rock, they also make it weigh a sixth of what it normally would when they carry it(45 pounds in a stack of 300) so with a leveled weight and melee damage stat they can gather and carry an ungodly amount of metal for you, oh and you hardly have to worry about them dying to anything short of an alpha or giga, they can have thousands of health and do a fair bit of damage with that club tail