Reverse band benches are essentially a lockout exercise, since the bands provide little assistance at the top of the movement; that really isn't what you're looking to improve.
Do speed work once a week; you can change it up and do it with a pause at the chest, developing speed strength has helped my bench a ton.
Also, bottoms up benching is good for the raw lifter, and is basically what this poster described above. You just set the bar on the pins (chest level) and that is where the rep starts.
Push ups on blocks or plates or even with push up grips are handy, since they allow you to go through a long ROM. And if you don't have any shoulder problems, below parallel dips allow this same type of ROM.
And as already mentioned, rotator cuff (external rotations), upper back work, and forearm work all help greatly.
At elitefts, search for "Benching for Strippers" by Jim Wendler, it has a lot of quality information.