Good to have one or two of (or even three if you're feeling adventurous) for resource trips when building your base. Pump their weight and they can really help transport quite a large amount of stone, wood, and other materials to make your base.
Tame ten of these phimomias and tame ten dung beetles. Force feed stim berries to phiomia and put dung beetles on wander. Load up the beetles with poop and BOOM infinite fertilizer and oil.
If you spam feed them stimberries they poop much more, however, make sure they have tons of berries in their inventory (Not narco or stim as leftovers) because they starve FAST when pooping.