Challenge mode-useful paddock combinations

You can make a tiny paddock with a high rating with Sauropelta (which has a population max of 4):
Sauropelta
Nodosaurus
Ankylosaurus
Polacanthus
What combinations do you find the most useful in Challenge mode?

I always do a carnivores paddock with 3 Ceratosaurus and 12 Dilophosaurus.
 
When I can unlock Suchomimus I add a pair to my park. They have a comfort threshold of 65% so it is just perfect if a storm breaks out. They also have almost the same requirements as Ceratosaurus to I just move them to my Ceratosaurus enclosure and let them fight. If I want to I heal them up so I have Ceratosaurs and Suchomimus in a pen with Dilophosaurus.
 
3 Dreadnoughtus(w/ cross species gene), 8 Diplodocus, and however many Tsintaosaurus until Dreadnoughtus social is maxed. Works amazingly well for me.

10 Iguanodons and 10 Olorotitans is also one of my favorites
 
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