This is my first ever go at fantasy F1. I don't know what the best tactic is. I went for Hamilton, Maldonado, Red Bull chassis and Ferrari Engine. (Belgian GP as my joker race). The way I understand it, you get the sum of the points that your drivers, chassis and engines get? As in, if two use the same car number, i.e. if you have both Hamilton and the Mercedes engines you only get the points once for that car's finishing position, hence why I spread mine out. I don't cover Mercedes or Renault, but I think Red Bull and Ferrari are going to be the front runners.
EDIT: The above is wrong, isn't it? Ah well, i've screwed up my choices then. I would never have went for Hamilton, I would have picked Alonso and gone with both Red Bull chassis and Renault engines. Maldonado would still have been picked though, so cheap!