Don't let these guys fool you. They may seem weak, but sabers are legitimately one of the best gateway dinos. Tame two high-leveled cats and breed them, imprint the baby, and boom- you've got your ticket to taming thylas, argents, bears, barys, etc. Pump up their health and you can face tank any of these things while knocking them out. Work up their weight a bit and you'll be able to tail your tame when it starts running. These guys are also great for kiting dinos into pens. In all ways a thylacoleo is better, but if you're not at that stage in the game yet, then get yourself a sabertooth.