When I was over 400, I did it by unconventional means. I was stupid, but what I did apparently worked for me. I was working with 4x10 with as heavy as I could go, generally 315 or higher. But I also practice with a lot of sub-maximal 3x3 sets. More or less, the bulk of my bench work was grinding out high volume reps, which I believe paid off for me.
I typically work with very high intensities on bench, even to this day. Its not uncommon for me to max out or do sets with my current max once every week or two weeks. But unlike most, my body doesn't seem phased or taxed by this style of training, like it does on deadlift and squats. I may be weird though, since my chest is structured considerably different from most.
The Greatest Respect You Can Earn is Self Respect.