Try to stay in flat open land, this allows you to easily snare the raptor with a bola. Approach slowly until it runs straight at you then throw the bola at it. Once hit with the bola you can easily KO it using any method you choose.
Use parasuar kibble for faster and higher level tames if possible since you need less than 30 kibbles for a perfect 100+ level tame. It may also be easier at lower levels since gathering meat can sometimes be difficult and parasuars are easy tames.