What didn't work for us was the slew of parenting/discipline books I bought. DS7 is a world class debater, extremely logical, seemingly mature and very determined if he wants something (did I just describe all the kids on this forum?). Rewards, extra/removal of privileges don't work - he's contemptuous of them in any form.
You certainly described my son to a T. I've always said that he was a nihilist because he doesn't care what I take away or give to him. He's going to do whatever it takes to do what he wants to do.
