We used to have a simple formula that I think worked well.
I used to just multiply the number of players by 10, and that would be how many points would be available that week (ex. 10 players=100 pts. available). Then we gave a % of those points to the top finishers of the week (usually top 6). You can adjust # and % as you see fit but we did something like....
1st=40%
2nd=25%
3rd=15%
4th=10%
5th=6th
6th=4%
gl
