Neither train at Westside, but they use our methods. Do mostly 8 sets of 2 reps with 45 seconds rest between sets. Do a single and then add a set of chains. Keep doing singles and adding a second and third set of chains until you break a PR or miss. You can do the same with Flex bands.
Good mornings are a great exercise to do with chains and bands.
High pulls with the pink or green bands are also great. I have seen one of our lifters with a 600 deadlift go to 670 in 6 months by using bands on the deadlift. Bob Young would use 275-315 on the bar, with about 200 pounds of tension from the bands. We use the platform that Jump-Stretch sells with their bands to do this exercise. If you want to excel at powerlifting or any sport, then you must develop speed strength, increase acceleration, and gain absolute strength.