I personally think
@DarkOperator618 will have a highly effective and efficient trial exam experience. Having the weighting of your trial exams reduced to 15% constitutes a great opportunity for you to benefit from sitting an exam that is similar to the HSC exam. While ensuring that you thoroughly study/prepare in order to perform to the best of your abilities remains important (as good performance may contribute positively to your final rank), having a rather low weighting for an exam that is rather significant allows you to focus on other aspects that are also relevant to the exam itself, such as assessing the effectiveness of your time management strategies as well as your study methods following completion of your trial exams, which will be crucial and can help you make a difference at the HSC exam. Of course, sitting a 3-hour exam is rarely a pleasant experience, particularly when it will only be worth 15%. However, it is also good because mistakes won't be as costly as they previously would've been. I'm sure you will be satisfied with how things will unfold!