El robo puedeser útil para aser toneladas de daño lo mejor es usan do lo como para matar giganotos titanos boses pero ojo el rinoceronte suene tener poca vida y poca stamina pero bueno es tu decisión
If you are on a pvp server(pve works as well), and you're raiding someone, try to use the rhino's charge attack. If your opponent has a rex, and you hit it with a full charge meter, it will be an instakill.
I recommend this for your main mount in the dragon boss fight. Specifically the one on the island as they can charge a rage meter which does crazy damage, they are herbivores so they take less damage, and you can shoot off their back.