It would be easier if we could see the level of your dinosaurs. But from what I see, I can tell you Pyroraptor got nerfed so you could consider ditching her. Rex is weak, she needs more health, she dies too fast, but she is a tank killer and with the current tank meta, you need all the tank destroying power you can get, so mynsdvice is to keep her. You could consider adding to your team Suchotator, Ankylocodon or Sarcorixis (give Einiasuchus priority over sarcorixis, though). Try to get a nodopatosaurus as well, she is an amazing tank.