Hey bcrew13,
Generally speaking, you want to score decent enough on the IR section so as not to draw negative attention to a low IR score.
You don't want the admissions committee to focus on a really low IR score of like 1 or 2 -- that shows lack of effort or ability
That said, it's not that much more beneficial to have a perfect 8 versus a 6 or 7.
So ideally, you want to stay in the 4, 5, 6, or 7 range to efficiently get a score that is decent without putting a crazy amount of effort.
Now, with your IR score of 8 – that is fantastic.
However, just keep in context your overall application profile. If you have a clear story/path/reason for business school and can differentiate yourself based on your work experience, then you got a lot going for you.
Remember, optimize for your overall application profile - not just one local maxima.