It can’t hurt to try waving the weight and changing up the accomodating resistance. I used to do the 45%, 50%, 55% each for one week (three week wave) and then up the max 5 pounds after a deload (or not deload sometimes), but now I sort of go by feel. Within my going by feel though I sometimes go heavier (or use more chains/band) and only for doubles or singles with more sets. Another thing to cycle is pausing on the chest versus rapid descent and quick turnaround.
You could do something like:
week 1 50% bar weight and 1.5 chains per side 6x3 (quick turnaround)
week 2 50% bar weight and 2 chains per side 8x2 (pausing on chest)
week 3 60% bar weight and 2 chains per side 10-12x1 (quick turnaround)
week 4 deload 45% bar weight and bands 5x3
Planning is always a good thing. The above was just something I came up with. I think as long as there is progression and some rhyme or reason to it that’s fine. I think Louie advocates keeping the total poundage consistent so adjust the reps and sets so that the weight x total reps is equal each week. I am not sure how important that actually is though.
You’d have to decide what it is you are trying to accomplish though. I think sometimes that singles are easier to really focus on making the movement fast, so that coud be something to try. I’ve gone as high as 65% percent bar weight with close to 30% accomodating resistance for singles, but the bar speed was starting to slow at the top instead of popping at lockout, so I dropped it back a bit. Also make sure you focus on your form on the DE stuff and try different grips to see what feels best.
Things that I think made my bench move up include: chain suspended fatbar bench at various heights (2 board height or less), floor press with a pause on the floor (like a box squat), floor press with chains (put about 60% of your max floor press on the bar and then start adding chain until failure), chain suspended fatbar reverse band bench (prepare to be humiliated), and fatbar incline press as ME or as accessory (for whatever reason this seems to move when my bench does and it seems to show some weaknesses/imbalances that I have).
Additionally, you can always work on/play with your arch, foot position, breathing, grip width, and bar path.
One other thing… Have you tried rowing the weight down? By this I mean actively engaging the pulling muscles on the descent and then exploding off the chest. This is what helped me discover how to pop the weight off my chest with my lats.