These things have amazing weight! If you level up their melee damage to over 1,550 I think around 400-500 dmg it could kill a wyvern. But play it safe and with a partner on another argentavis. But make sure to single out the wyvern.
1-2 tranq darts in head and he’s knocked, go get some meat and kill some of those jellyfish and get bio toxin then put the bio toxin in it and feed it until the argies hunger is on 1000 or less then put all your meat in it
If you need an argy and don’t have time to tame one with a trap, just go to carno island, kill a Dino in front of an argy and let it harvest its body. When the green health icon shows up on top of it, knock it out with tranq arrows and the argy is instantly yours.