Lv15 Spinosaurs can work with their enough power, but Lv14 can't do that cause Dime will remain 5 Hp after a Strike and Impact, plus they can't tank whole attacks (except LW bypass Evasion from Gallimimus.) And Sarcorixis can work well here, FI + RS without problem. (About the Speed, I will not suggest you to bring creature under 112 Spd)