You need to reach out to coaches now. Ask to join workouts. In my experience, all but about 3 spots are decided on any given team before tryouts even happen. They're looking for a unicorn or defector from a rival. In most cases, the incumbent players get the nod but, either way, you need to start being a politician now. We all hate that... but if you don't, your kid has to be the unicorn. That means she had a great night's sleep, ate well that morning and is really good at playing 3 v 3 with complete strangers, etc. It's really just not a fair process.