I wish I had some suggestions for you, but alas, I'm unsure of that one. I just took my NCLEX-PN yesterday and don't know the result yet. So I have nothing to compare it to results wise.

I will say that it is a longgggg test (the HESI) and most of the people I knew, including me, got under the supposed average grade for it. Don't sweat it, just take the score as it comes and see where you need to improve before you complete your NCLEX-PN!
Good luck!
Nikki