Besides doing more feedback and cross checking the answers given with the feedback you mean?
Okay you had a 74% on those. That means you only have to improve on each by 1%. How hard could that be?
First thing you should do RIGHT now is stop worrying about taking them.
You will get them done before using up your last sitting.
If you haven't already done so, I suggest getting feedback from abacus. Of course you'd have to shell out some cash but it's definately worth it. (A lot of my buddies used feedback from abacus and they were not surprised when they took their ATPL exams).
No worries, you'll pass those exams if you just push a bit more.
good luck.