it's not what trick you're gonna throw.. but, how can you throw the trick differently then the other 5,000 people out there? Lots of people throw cork 9's, it's the style that will seperate you. So I ask you which trick you have the most style on and feel the most comfortable with?
All good tricks, depending on the judges (alot of judges don't know much, so they don't really value unnutral tricks much higher than natural)
If you have decent judges, then they are going to consider the unnatural cork 5 and unnatural misty 7 probably more technical than the cork 9.
Eat. Sleep. Breathe. Ski.