I have a level 37 lysostrosaurus that is a beast. 3 titanomyrma started attacking me after I died and was gong to get my stuff back. One level 80, second 150, and the other 180. I distracted them while he beat the shit out of them. He lived through it and got us a shit ton of XP.
Find a lot of rare flowers in beaver dams and use them to tame lystrosaurus, then use their eggs to get diplodocus. Use diplodocus eggs to get allosaurus. These dinos are a great way to move up fast on PvP servers by getting a lot of allosaurus
Lystrosaurus, this little reptile could have it all in the fierce war between the dodo and kairuku. They are like little puppy dogs, which means you pet them and they do some cool trick, like a backflip. They are great to have around bases, as they provide an xp buff so other dinos lvl quicker. Lystro army is also funny, I mean look at their little legs they're so adorable yes you are little lystro! Oops, gotta keep it professional here. Yeah they're great