Okay so I have been pretty sure for a while that I want to do 3 unit math and hopefully go on to do 4 unit in year 12. Then I looked at the 2011 HSC general maths paper and realized that it wouldn't be difficult to get a very high raw mark in it if you have some aptitude and dedications towards maths. Any suggestions.
Oh I also want to get 97+ ATAR and I'm not sure if it is even possible for general maths.
The logic here is severely flawed. You say you've got the aptitude to do well in maths so that's one reason to do MX1. The status quo is that if you like 2U Maths, then you should attempt MX1, and if you do well in MX1, you should attempt MX2.
And an even more convincing argument to do MX1/MX2 is that you'd be knocking off 4 units of subjects whereas doing General means you're only knocking off 2. Now, if you can do well in maths, MX2 isn't all too different from MX1 (there's integration, mechanics, conics - just like MX1, and complex numbers is an extension on everyday algebra, etc. and so on).
And lastly, you are required to be exceptional in General in order to be a middle-high student in MX1/MX2, when it comes to ATAR scaling.
Also think about the uni course you would like to do. Many assume the knowledge of 2U maths at the very least. Even if the content isn't relevant, it's the logic behind 2U/MX1/MX2 which is relevant.