Get the dream team™, get a trike and use it's charge attack so the carno is dazed, get a parasaur and pump it full of health so it can tank the hits, and an optional two dilos to provide supporting fire (doesn't matter if they die, easy tame) while you provide backup arrows.
Me: let’s go get some fish!
Me: sees spino.
Me: oh no! Goes the other way.
Caro: zooms in from nowhere.
Carno: is speed.
Diplodocus: AAAAAAAAAAAAAAAAAAAAA CARNO FIGHT ME INSTEAD
me: thank you massive dino.
I encountered one of these on my first day of ark, it was my fault I died from it because I went to the swamp when I was only on level two. At first a though it was an allosaurus, but I soon found out that it was a Carno. I’ve decided that I’m staying out of the swamp until I’m a higher level and when I have a couple dilos.