Easy way to tame one. IMO

1. build atleast 4 behemoth gates and 2 doors

make the gap between each so an argy can fit through. lure a female of your choice inside and fly out from the gap.

2. Lower its health to 10% easy way is to use wolf. so you can know when its health is below 10% its hp indicator will turn red.

3. just throw in the dino you qant to use as a host. even a bronto fits inside the cage. then use the pheramone with the tame(pheramone from killing male rhynio)

after it inhects its baby it will try to flee. just head out with your dino from the opposite side of the rhynio so you can use it again.

enjoy