Sadly that is the easiest way to do it.
They should just reword the achieve to read:
Know Your Role:
Sucker someone into doing the following dailies for you
I see a lot of people suggesting hitting Cheng Bo! and run away, you must be aware that Cheng Bo has one of the charging adds which if you are to far away you get charged by it. So make sure not to get aggro on him and only Cheng Bo.
I have never seen Uruk quest, ever. I've done the others 6 times over and always get Cheng Bo. >.<