Tigers of Old said:
I'm there with you Freezer. Never done this before..I'm sure there's a formula. :headscratch
Best thing you can do is watch the preseason form of the draftees and other guys at the very low end of the pricing range to try to suss out who's going to get a regular game.
Also you need to decide on some lower priced guys (200-350k mark) that you think are under valued, perhaps because they had an injury interrupted year last year, or weren't given a go and have moved to a new club. Monitor the preseason form of a few of these guys, if you haven't been on it, fan footy's a great site for dreamteam and supercoach scores
http://www.fanfooty.com.au/.
Obviously you want to have a few stars, and particularly a couple of blokes you can rely on to post consistently high scores, the double points you get from your captain can be the difference between a good score and a great score. From your team I'd rate Daniel Cross your best captain material, I had him from the start of last year until he got injured and he consistently scored between 100-150 (scored 141 against the roos on the weekend too).
On the stars, the way they work out the rise and fall of player values throughout the season means it's extremely hard for a bloke who has a very high start value (eg. Bartel) to maintain their value; blokes like that are almost guaranteed to have a drop in value. I always think it's better to have a mid range player (say Nathan Jones) you're certain will improve (and thus whose value will increase) who you can trade up to a star after say 8 rounds, and if you've chosen your rookies well you'll be able to down grade one of them for another and pocket the cash. That way you'll have a good spread of players and be in a position to make your team stronger as the season progresses.
I have a rule of not picking up 2nd year players, they tend to be overvalued and the 2nd year blues syndrome is too much of a reality for me to consider them. Teams also tend to be more likely to man up on a 2nd year player if he had a good 1st year and that can also lessen his ability to post good scores.
Hope some of this helps.