In all honesty, there's so many more factors to consider with regards to your 95+ ATAR aim:
1) How many people get a 95+ ATAR every year on average in your school?
2) How many people get a Band 6 in SOR1 (assuming you want to get a Band 6)?
3) Externals will contribute 50% of your ATAR.
Right now, I wouldn't focus on worrying about your ATAR and how that will be affected; rather, focus on the next exam or next assignment, spend quality time putting in hard work and consistency and sure enough, with strong results, you should be able to get your target ATAR at the end of next year.