There's plenty of all in players in open league tournament so play very tight in the beginning and avoid losing before the bubble or you'll get minus points. Your main goal should be to survive into the prizes. That's basically just doubling your initial stack at some point. After the bubble you should play very aggressive and try to double/triple your chips asap. If you manage to do that then just play your best game and aim for the final table. Getting into the final table is basically the next big increase in points.