One of my favourite dinos. Swarms of these can destroy anything due to their ability of having no hit-box meaning they never die a pack of high lvl dimorphs (20-30) can take out an alpha carno with ease. I recommend pumping health to 400+ move speed to 130% so the hit box is even more buggy and then just melee. Make aure you tame a few as on there own they are much less powerful.
Get a few tranq arrows, and snipe it while it's in the air and aim for the head and fire once or twice. Then feed it 2 meat and narcotics if you need to do other things. But I used my fists so it was unconscious.