Maths and Science will cover it. The main place where people don't perform well is the Science and writing tests. I think going to tutoring or buying practice exams for these tests could be useful since you wouldn't have done these kinds of tests elsewhere.
Numerical Reasoning and Maths were pretty standard tests, if you did the selective entry exam, they were easier than those (at least in my year, I know the selective test changed this year). The numerical reasoning test is actually very similar to the practice version for select entry on the victorian government website (one of the questions from this year's test was literally on that practice test). I wouldn't stress too much about these, just go through a maths textbook and do some time practice test and you should be good.
Science Reasoning is a mixture of general science knowledge questions and data analysis questions. To practice the data analysis questions, I would suggest the ICAS Science tests as those are as close as you're going to get to the questions on the test. With the general knowledge, like with Maths, knowing your Year 9 content should cover it. I honestly am bad with Science general knowledge since my old school didn't teach it very well but I still ended up with an above average (I think my data analysis carried though).
There are 2 writing components, a science report and a science essay (forgot their actual names). Going to tutoring for these tests would be beneficial although you don't need it. For the science report, we had the information and method for a random experiment and we had to write a hypothesis, discussion and conclusion I think. Really knowing the in depth rules and components of a report is crucial for this. My school covered this heavily earlier this year and I ended up getting a superior for this test. Your discussion should be about 2 paragraphs (include improvements, accuracy, reliability, repeatability, etc.) and is probably the part that most people mess up on. I can go more in depth on this if you would like.
For the Science Essay, you get this page of information on a random topic (I got black soldier flies and its impact on greenhouse emissions, it was an absolutely awful prompt). It's just your regular essay format (2 - 3 body paragraphs), and you basically use the information given and some of your own if you can to take a stance and sort list the effects and such.
As far as tips, bring an analog watch (not digital) since I don't think there were any clocks and they only gave time stamps like once maybe. Set the minute hand to start at the very top so its easier to read since all the test were half an hour. I don't really have any other tips, as long as you study the content