1 bring more tranq arrows meat and soothing balm if u cant afford main taming food for this beast

2 Find high terrain that he cant reach you

3 Use recommend using crossbow if u cant afford use Bow if you want to challenge yourself try slingshot with hundreds of rocks

4 if this beast run to you just dont chase be good at aiming until u take em down this is why other players and i recommend using crossbow if you on mid level

5 If you take rex down Read 1st step

be patience until you tamed it

6 goodluck hunting with your new beast