You can use sarcos,ichtisaurus to make the mantas close to the basi grt distracted but if u wanna kill the mantas u can bring a spino and bring the mantas to land and the kill them with the spino or use a Meg and other options are another basi,plesiosaurus sarcosuchis(high lv with health) and a baryonix the basi eats Meat i use normal Meat cuz im too laxy to searh for prime but u can use prime if u want hope this helped:).