These AMRAP sets are where the magic happens. Pushing or pulling 87.5 percent for as many reps as you can is going to be taxing. But it's also going to help your lifts enormously. Push yourself.
If you haven't filmed yourself doing the squat, bench, and deadlift yet, I highly recommend that you do. Grab a friend or set up a phone so you can see yourself lift from the side. Study how you lift, and see what you can change in order to do the moves more efficiently.
5 sets of 2 reps, go to failure on final set
5 sets of 3 reps, go to failure on final set
30 sec. rest between sets