Do you have advice on how to win Halo 3 campaign on the ';Meta-Game';?

Unlock skulls and turn them on before the meta-game. Playing on a solid difficulty with a few skulls activated gives you multipliers for your score, so you can pile up points quickly. Different skulls have different effects, so try to mix-and-match the ones that work best for you.Do you have advice on how to win Halo 3 campaign on the ';Meta-Game';?
Do Normal difficulty with Fog, Catch and Famine skulls turned on it is really easy and will get you a safe amount of points