I tamed one today, and it was really easy.
Dont care about to build a cage or something. They goes down after a few arrows and are really slow, so just walk away from it and shot a few times. It was like four prime meat whitout any narcotics. Dont worry about to tame new dinos, its just 99% of the times it goes bad as hell.
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.