These are amazing. The high health, amazing weight, and speed make them even better than a bronto at times, i currently have 4 kibble tames that can transport half my base worth the items from the red obelisk to the redwoods in under 30 minutes
I use my paracer as my cargo transport dino for short to mid distance. I use it to go to the redwood nearby and gather MASSIVE amounts of metal. Just hop off, get the metal, load up the paracer, then get back home. They can defend themselves quite effectively
On Scorched Earth the Paracer with its platform saddle is a needed tame. You can put a cannon on it and use it for taming Rock Elementals or use its high weight and health for carrying large loads of supplies around through dangerous areas.