That's exactly what Pentagram partner Paula Scher did for years. Differentiate Needs and Wants Calisthenics aside, the first step in any negotiation is understanding needs - yours and your client's. Blue sky the first list. Be aware you may not be successful in getting any of them. Be prepared to walk away from a job if you can't meet your own minimums.
Creative problem solving can sometimes turn an apparent loser into a job with possibilities.
To a point. Billout assiduously avoids buyouts. If on occasion he does sell all rights, he does so only for a specific term so the rights ultimately come back to him. Interestingly, he rarely walks away from a job. In any negotiation, information equals leverage.