nice run ^^

Hey there, I got a little problem here.

In the game I moderate, we have a category called "Low%". In all other full-game runs, of course the lowest time is the main criteria for getting a good ranking. However, for Low% we want the percantage achieved as main criteria and then the time of the run to determine the rank of the runners. E.g.: A 30 min run with 15% should be better than a 25min run with 20%. How do you set that up?

I'm thinking about running the game and just wanted to know (since it appears to make a huge difference) what's a good cap for FPS?