Here's what you can do.
Workout 1
Triples or doubles up to a max triple or max double.
Then strip of 15-20 lbs, and do 3-4 more sets.
Workout 2
5-6 sets with triples, using 65% of your TRUE current 1RM (don't go too heavy). Be very explosive, but with good form.
Workout 3
Repeat workout 2
BTW, get rid of ANY shoulder pressing, or any triceps work such as extensions or french presses.
Just benchpress and that's it.
Two weeks out, do a lift out with 30-40 lbs over your 1RM, and hold it for 5 seconds. Then re-rack it. Don't try to lift it.
7 days out, do 3-4 singles up to 10 lbs under your current 1RM.
Two days before the contest, do 3*3 with a very light weight, to "wake" yourself, eg 95-120 lbs. Very quick reps.