I am just beginning my 4th hst cycle. When I started, I read over everything I could find on reps and sets. I also got the ebook by Charles Ridgley. In this ebook, there is particular stress on volume, so I emailed Byran to ask about this very subject. He was kind enough to reply (his reply was similar to his post on this question).
With this frame of refererence, I decided to start with 1 set of 15's, 2 sets of 10's and 4 sets of 5's (the 10's and 5's have the same total number of sets). This has worked out very well. Usually by the end of the 5's though, I'm more than ready to SD, especially with the last cycle. I did deadlifts every workout last cycle, and along with everything else, the 5's (in particular) were very taxing.