This is basically the go to choice for almost all the bosses.why? because its the one of the best for fighting bosses especially forest,ice and megapithecus, because point you probably don't have a giga at that point,it has high HP and high damage and if you breed it up..it's gonna crush the weaker bosses.if you want to add up the damage output of the Rex with the yuty then sure you can do it if you're willing to go into the snow and possibly get ambushed by purlovias.

So my experience with this beast was horrifying but I knocked it out it took so much tranq arrows it took 30 tranq arrows and I ran fast with the Brontos because there were lots of dinos with the brontosaurus then it was attacking the other dinos then I shot it a lot then it fell asleep because the thing it was attacking a a tank it was an ankylo so that’s my experience with a rex.

How to tame: get tranqs and meat and some narcs and bear traps. Spot a Rex. Watch Rex get eaten by spino. Tame spino instead.

To be honest spino is easier. It costs Less narcs meat tranqs and levels for saddle. It is more powerful then a Rex on its hind legs. I don’t want anyone to be mad but the Rex is weak compared to the spino. I suggest skipping the Rex. Unless you have a tek rex saddle I would never tame one. Tame some yutys and spinos instead. -lava

The best way to tame it is to stand at a high point the shoot like any other dino then build around it a spike walls and let its food level drop near half while keeping it unconscious with bio toxins(make sure to take enough 70 just to be safe)

You can even explore a little around then when its food gets near half feed it any kind of meat doesn’t have to be prime and it will be tamed under 30 sec

I saw a Rex near where my base is and I didn't want it to get closer so I took all my stuff out of my inventory and I ran up to it and led it to a Wolly Rino but it killed the Rino than I just led it further back so it wasn't as close to my base it was just a level 4 with a thousand health but I didn't really have great tools so I led it off!

I found the best way to tame aggressive and more dangerous creatures is to use Tapejara (saddle acquired at level 55). They can land on high and vertical surfaces while still allowing you to shoot. If the tame is not close enough to the ledge, I suggest shooting it or Argo-ing it to follow you. This method helped a lot i was able to easily tame a spino and Rex.

Well I don't know if it happen in pc because I am good with mobile control and play ark mobile but for me rex is soo much easier then taming spino you just need a high place where rex can't reach you and hit him with treanq arrow or tranquilizer dert until it got unconscious then just feed prime meat it won't take lot narcotic 10 is enough for me I didn't even needed narcotic I tamed a mex level rex without narcotic