I would think these were gonna be harder to tame but they’re actually not that hard, my stamina and movement speed is pretty high I’d say around 200 or higher but I didn’t need a trap or any of that, all I used was tranq arrows, u shoot it once then run away for a little bit turn around quick shoot it again then run away again and shoot it again and repeat, if it starts running it means it’s almost knocked out just chase after it and keep shooting and feed it meat!
If you're using a taming pen for rexes, build it at least three walls high. Sure you are able to keep it inside the two walls high pen, but an especially cheeky rex might climb out of it, which is definitely not going to end well for you.
Place 1 stone foundation near the rex you want to tame, (not too close) then 1 doorframe and door, both stone. Then place 3 stone walls around it. Add an extra layer on top of the base structure of stone doorframes then cap it of with a ceiling. Shoot the rex to get it’s attention, then run inside and the rex won’t be able to hit you, but you’ll be able to shoot it. This trap also works for Spinosaurus and dire bears.
If you use the bear trap strategy which is if you lead it into a Dino gateway that is shaped in a triangle and with a bear trap in the middle (Large Beartrap) and when it is stuck you must put a dinogate behind it to trap it and then knock out.
If you’re not going to use a trap, I suggest riding a griffin or another flying mount that allows weapons, although taming a high level Rex is much easier with a trap as it ensures it won’t die attacking another creature. My trap suggestion is rather simple. You place down 3 stone Dino gates (not behemoth) in a square shape and hold onto the last one. Then you lure in your chosen Rex with another tame (this is the difficult bit). Once it starts attacking one of the gates, place the 4th behind it, and then happy tranq-ing. Hope this helps you :).
I'm going to tell you, there is an easier way than finishing thousands of wood stones and thach just for making REX traps in the evolved survival arc. Want to know how? Guaranteed this is really different from the others. Just watch it.
How? Don't forget to press the red button and the bell !!
Once tamed are great and with a saddle better but they can’t swim well and here’s the big one they take huge fall damage so don’t go thinking jump off a mountain because he can’t it will Die but believe me I tried
Dont be scared of them, get a flyer and make sure to have a high health and stamina, fly at him (make sure its only one or your dunso) and let him take a bite of your flyer once in a while then lead him into a square wall of dino gates with a trap in it. Once he is stuck quickly close up the open gate, laugh at him and shoot him (alot)