I did 10 events spread over different accounts, I won 7 out of 10. For the jurassic I would recommend 3 amphibians, 1 at least VIP level 30 or higher or Gorgosuchus 20. Carnivores at least 1 with more than 2000 defense. Most of the time I got a dino with those characteristics.
The 1st Battle is always indoraptor between levels 1 and 6, it depends on the dinos you choose. I never attack the first turn, reserve and the next turn reserve 2 and defend 1, in all cases I attack with 1, which allowed me to beat him with the points I had.
2nd battle ceratosaur always appears, that is good because of its low attack it allows to reserve points, it came out accompanied by 2 Vip herbivores level 10 or similar, in some cases a pterosaur, here a carnivore comes into play to deactivate it.
3rd battle 2 carnivores, including trodon. Easy for a couple of amphibians.
4th and 5th battle: 3 carnivores, all between 4500 and 6000 defense, (depends on the dinos you choose) Gorgosuchus or similar amphibian can defeat them with a 2 hit attack. The ideal is to reach this last battle with him to make things much easier. I add images of those fights in the different accounts.
My main account
It should be mentioned that the AI seeks to reach 6 points; If he has 4 points, he will reserve 2 and defend 2. Likewise if he has a class disadvantage he will not attack until he reaches 5 points, here he can attack you with 5 if he can beat you or he will reserve 3 to reach 7 points.