When you get the quest called Raptor Captor. You'll have to catch 6 raptor's with a rope (like the Ogri'la quest where you have to capture those nether ray's)
now to the reason why i made this post.
the raptors it self arent very hard to catch at all - but you can captor 2 raptors at the same time.
as you see on the screenshot i play a warlock at the moment, so what i did i multi'dotted 2 raptors until they were under 20% Hp and used the rope and caught both raptors at once it might save you some time if you can do the multi dot part or playing a class that can kill more targets at the same time.
PS. first contribution - dont flame =)