1. Mobile base: Brontosaurus has a pretty big platform saddle, you can literally just live on their back aside from getting vegetable crops. They're good on big maps like ragnarok if you can't decide where to live.
2. Berry gatherer: It has the most efficient gathering rate, just keep in mind it's slower than molasses.
3. Dino protector: Brontos have a rather low damage output for their size, but male up for it with high knockback and a massive AOE.