Make trap with 4-5 metall gates and a behemoth gate. Trap him inside . (Gate closed of course)Make the Same trap on the other side of the gate . Feed him with some Baby rex -spino -Wyvern. If he is in friendship Mode throw a Kryo with Bronto - gigas or other Fully grown Tames you can spare. When the are in Kryosleep on the other Side of the Gate .Release the tamed Dinos. Ride the Carcho open the gate eat sleeping Dino. Close the gate and get of him and throw another kryod Dino on the empty Side. Repeat untill you get 100% . That way you can get 100% taming efficency

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