I need to kill a tuso

What r ur thought u guys. I have a mosa with 20k health and like 600% melee i just tamed and need to kill a level 20 tuso for the black pearls so i can later tame my own. This isnt the old mobile so they can now grab mosas which is the kicker for me. Im really worried it will kill me with its grabs before i can finish it off. Pls tell me u guys’ thoughts.