Get a medium mount like a parasaur, go next to a rock and dismount so you're on the rock, then throw a shoot an arrow at the raptor so it runs closer. It can't get on the rock so then you can Bola and tranq it. Tames very quickly or at least it did for me. Fast and good melee but stamina is not great so level that. Good at getting meat, hide, keratin etc.

GD