I have coached and judged many high school tryouts and I have found that the easiest, most efficient way to score tryout canidates is by having 5 categories (running tumbling/standing tumbling, stunting, dance, cheer, and jumps). For each category, I put a space for the judges to put either + (superior), @ (average), or - (below average). Then I have a line next to the +/@/- where judges can write brief comments to explain. At the bottom of the page I put Varsity Game, Varsity Comp, JV Game and JV Comp and ask the judges to circle which team(s) they think the applicant would represent best and be an asset to. The reason I don't use numerical scoring is because it is a pain for me to add up and what team does a 7.5, 6.8, 8, or 5.5 represent?? More important than the scoresheet is who you choose to judge your tryouts. Make sure you have people in that room with you who you trust and value their opinions. I know, for me, I use the judges as more of a sounding board to bounce ideas off of like, "would you take this flyer over that flyer" or "if I take a large varsity instead of medium, which 4 girls would you say I should pull up to fill those positions"?
Let's just be real here, coaches choose their teams or at least that is how it should be. Most judges that attend tryouts know nothing about the applicants' attiudes, work ethic or dedication. We all know there is always the extremely talented cheerleader who constantly sits out at practices because she "jammed her pinky" or "stubbed her toe" and then there is the girl who is the good base, who never sits out, but still doesn't have her standing back that you need on Varsity, however her amazingly positive attitude and talent elsewhere are what make you put her on the team. No other high school sports team would ever have judges who don't know their athletes choose their teams and Cheer should not be an exception.
I hope my rant wasn't too off base there. You can probably tell I've had some experience with this. I would be happy to send you my scoresheets I used this season if it helps you.