If everything else is basically flawless, I would say a max of 9 could be possible as for example on most cards that have print lines on the front holo surface will get knocked down minimum 1 grade point but I feel they are usually harsher on the front of the card as well.
You could share this question over here as well, you may get some more insight:
www.elitefourum.com/t/the-giant-professional-grading-thread/30930/1