I really like both of these hybrids, but realized that Megalosuchus for a legendary is missing something to really make it better than say an epic hybrid like Gorgosuchus or Postimetridon. I realized that it not being immune or not having a shield breaking move makes it pretty weak. My suggestions is swap the two hybrids first strike. Give Megalosuchus the shield breaking ability of Defense Shattering Strike and give Postimetridon Pinning strike.
My thought is Postimetridon is immune and the ability to pin speedy swappers would help it get in one extra move it might need. Also Megalosuchus would have a shield breaker that isn’t devastating like Defense Shattering Impact.
Both minor buffs, but really helps their strategy advantages.