You're probably playing for the bonus right? My suggestion is...
-Play 4 tables of cash games. You will earn poker points much faster. If you aren't comfortable with that many tables, start with 2, then 3, then 4. Your are going to earn poker points so much faster if you multi-table.
As for the game, I guess that's up to you. With your bankroll, you should probably only play $0.02/$0.05. Hold'em vs Omaha is your call...
I'm just giving you a heads up: When I played 4 tables of $0.02/$0.05 NL Hold'em, I earned about 7 poker points an hour or so. You should expect to be playing for about 7 hours or so cumulatively if you want to reach 50 poker points. Keep that in mind, because your bankroll might not be big enough to sustain a couple bad beats. I would also suggest playing tight...good luck!