The Destroyer is definitely helpful for the QR section. Judging from the recent posts it seems that there are a ton of word problems also, so you might want to focus on those. There are plenty of chances for practice in the Destroyer but if you want some more a great site for some practice is Purplemath.com. In general the more problems you do the better your chances, so it really all depends on how much time you have until your exam.
Good luck with the studying, Im sure youll do great
