1. I don't coach Powerlifting. You get stronger on the bench by utilizing the stretch reflex at the bottom.
2. I did a heavy workout with doubles or triples the Monday before the meet, and then Thursday did a circuit of light squat/bench/deadlift to keep the grooves fresh.
3. I didn't deadlift except at the meet. I knew how to deadlift, and it didn't need reintroduction.