Keep training the singles, but really, it would help if we knew what portion of your lift you get stuck in. Because you’ll be competing raw, I assume, you’ll probably be having some issues with exploding out of the bottom. Make sure you’re doing some DE(speed) work with your regular pressing, because I’ve seen a huge boost in my bench strength after switching over to combination speed/max work.
Make sure you cover what Dave Tate has written on this, and as we speak, there’s a couple bench articles on the front page of the Elite FTS article section.
Big ones that helped me maximize my pressing instantly(technique fixes):“If you think you’re tight, get tighter”, “Pull the bar down under control, but not too slowly, and get ready to explode upwards with everything you’ve got, while staying tight the entire time.”, “Find your personal groove; everyone starts the press from different places, so find what works for you.”, “Make sure that you’re receiving a hand-off (like you will be in competition), so when you initiate the press, your shoulders can stay down and tight.”, “Think triceps, not chest!”, “TUCK, TUCK, TUCK! (don’t let your elbows flare out, and keep them tight so you maintain your lat tension)”, “Make sure you can feel your lats at the very bottom (they help initiate the press).”
I personally think it’s a bit late for any serious programming changes, so make sure you have someone knowledgeable handy who can critique your form. Though I still believe adding a bit of speed work will make a huge difference if you haven’t done so already. Also, when I first benched, I had shoulder problems from weak external rotators. I strengthened the shit out of them over the course of a few weeks after seeing my PT, and my bench went up from 205(pre 2 PT sessions) to 245(after the second PT check-up, which was shortly after the first) in a few weeks, at that time. Might be worth looking into if you’re like most others and neglect your back/external rotator-cuff work.
As has also been mentioned, make sure your volume isn’t ridiculous(don’t bench with full-effort more than a couple times per week) as you approach a meet. Scaling back the volume, while keeping the weight up, helps with your confidence during the meet, and you won’t have an exhausted CNS/musculature.
Oh, and lastly, don’t ALWAYS do regular bench pressing for the heavy stuff (multitude of reasons)! Find out what portion of the lift you’re stalling in, and correct it by using a bench-type lift which targets that portion. The elite FTS bench manual covers the different lifts and what aspect they help (bottom, middle, lockout), and the free, couple-page online version at least lists the lifts.