I don't think it's much point.. btw uni's do justify the fact about this indirectly. They offer bonus points to people who do well in the 'assumed knowledge' that is needed to get a full understanding of the course. So if english dragged you down, the bonus points can still save you. ATAR is just a number, you need a goal. Your goal is not to get a 99.95 ATAR because it sounds good/nice. You need to be realistic and see the cut offs for the courses you want to enter.
Besides I was told, once you enter uni, no one bothers to ask about your ATAR anymore. I think it's true, because then it's whether you pass your courses or not, nobody will care if you're a 99.95 student because if you can't pass the course then that is your fault and you need to redo it. What's past is past, and it's not like a high ATAR will make you famous in the first year of uni anyway because it will be easily forgotten. There's no need to idolise a high ATAR as something everyone should acheive, only ~40 people in the state will get it, and all that matters is that it is used for university admission, and once it's purpose is done it's done.
so basically I'm saying there's no point setting a unclear goal to get a 99+ ATAR if you don't know what you're going to do anyway, just because it sounds good and easy and effective to brag about for 3 months or so.
plus you aren't seeming to do bad at school anyway, you're just too worried about the 99.95 ATAR and english going to drag you down. English drags everyone down, everyone's doing it. You should be happy that you're going to get an ATAR to get into uni anyway, as people with ATARs <40 won't. There's just too much hype and overratedness over the ATAR being the sole determinator of your career and life, there's stuff such as alternative pathways and mature entry, and there's always TAFE. So even if you get a lower ATAR than what you were going for, you can still take alternative pathways to do the course you wanted, just that it takes longer time that's all. Your life isn't going to collapse once you get an 85 ATAR, because you can still do lots of courses in uni with it than a person with a 70. It's still a great ATAR, I mean you beat 85% of the state.
You should be happy and prepared if you want to do well for your goals, just don't make a tentative one such as getting the 'perfect' 99.95 because it sounds good and flashy and you don't even know what you're doing for uni. You don't even need that high if you are not doing law or med as it is kind of unnecessary. No job interview is going to ask for your ATAR, as it wears off in less than a year, and they're looking for your skills and education rather than a number that screams 'perfect', because that doesn't mean anything after your course is offered.