I am on week 25 of the 28 week program and did a meet at week 23 and hit PR's on all my lifts including a 25# PR on squats (550-575). My template looked like this.
Deadlift (as prescribed)
Overhead Press (as prescribed)
Good Morning (3 sets of 10-15)
Bench (as prescribed)
DB Row (3x10 or 1 20+ Kroc Row set)
Triceps (2 sets of whatever x 20 reps)
Biceps (2 sets of whatever x 20 reps)
Squat (as prescribed)
Abs (5 sets of 10-20 reps of whatever)
That was it for assistance and I would say that at least 75% of the time I didn't even do all that I listed here but I did go balls out on the main lifts. I also went beltless for the the first 21 weeks.
Follow the program as listed, keep track of your rep PR's and try to beat them every session and minimize your assistance work. Also, start your TM really low. I started at 85% and if I did it again I would either start at 80% or make sure and reset (go back 2-3 cycles) my TM after the 5th cycle.