If you play against an opponent with a significantly lower rating, you'll gain very little rating points upon winning (if the difference is more than 400 points, you get +1 for a win and -32 for a loss, I think), so farming rating points against noobs isn't the best idea.
I don't think the tournament rating is any better than the general one (seasonal + tournament). In the group stages of tournaments, you often encounter weak opponents, while in the season, some specifically look for stronger players.
Better find a candidate for this difficult task, or is it already decided and Nitro will be doing it?;)
лето 2012.