Rock elementals are extremely tough to kill or knockout. Over encumbering them inside or around your base and setting them to aggressive allows them to defend your base with their rock throw attack without being kited away by enemies.
Rock golems take no damage from elemental attacks, lava and take a 50% damage reduction from bites without a saddle, making them perfect wyvern killers. They also can’t be grabbed by tusos, and have no oxygen tank so they’re good squid killers, just bear in mind they can’t swim up so you’re probably not gonna be able to get your golem back.
If our tribe goes egg-stealing, we always have at least two tribe members on Golems at the edge of World's Scar. When he stealer flies away, the Golems agro the wyverns and kill them all (immune to elemental attacks) for TONS of free milk
By adding ramps on a paracer platform saddle, you can exploit a glitch that makes the elemental's weight not affect the paracer. You can use this to gather massive amounts of materials. (Have one person drive the paracer, while someone else rides the elemental and harvests)
I’m not sure if I’m misunderstanding or what but at least in my experience they Rock Golem does not collect flint or metal from rock and metal nodes. This was disappointing to me. On the other hand they are still good because they can dual harvest both wood and stone unlike the doed. Though I would prefer if they had the weight bonus which they do not