Use a tranq darts with a longneck rifle and aim for the head. The headshots do way more damage. When taming this dino pay very close attention to its torpore timer. It has about a 3 and a half minutes of torpor. Use demetrodon kibble for the highest level, but crops or mejoberryies is good as well. If you want a very quick tame lookup on youtube a really cool stimberry trick (Look up Ark Stimberry Taming). This trick is good if you want a fast taming dino, but its difficult to do with this dino because of its little torpor timer.