After spending hours trying to figure out how to tame this brute of a beast, my wife and I found a way that worked like an absolute charm.

First, get a team of at least two people. One person must be wearing ghille armor and get into the charcis area. Be sure to fly in or have at least one decent Argentavis with you.

Second, start a kill pile of animals that can be dragged such as Carnos, trikes, and parasaurs. The bigger the better.

Third, have the player in ghille armor approach the charchi with a kill in hand to activate the handshake. DO NOT use a metal cage or traps as this will cause the charci to bug. Once the charchi begins ro sniff, drop the kill and run away. Repeat this step until the handshake stage is complete and turns green.

The final step requires teamwork. One person must ride the charchi to begin killing animals to start the taming process. The other person must use an argentavis to fly ahead of the charchi and begin wounding large animals such as diplos, brontos, and allosauruses. This way, the charchi can get large kills with almost no effort or damage (which negatively effects the taming efficiency) while preserving as much stamina as possible. Having your teamate fly ahead also allows the player on the charchi to more easily locate prey.

We're on the our second charchi now and this has worked wonderfully. Happy taming!!