Generally 3,000,000 points is usually safe for 1-10% for most PFs,
to be safe I always aim for 4 million. Top 1-10 tier varies greatly from PF to PF. Sometimes the cutoff point is 10m, sometimes it's 26m or something insane like that. For the Medici Rewards, I'd say around 2 million or higher would be safe for 1-100.
Liam posted an "Official - Prize Fight Score Thread" quite a while back and the numbers might be a bit off now... However it's still good for a general idea of what to do for scoring.
Here:
http://forum.skullgirlsmobile.com/threads/official-prize-fight-score-thread.845/
Welcome to the grind!