When I used to train with some power lifting guys we did some pretty cool stuff with bands. The first 2 weeks you do only 135 with bands, we would do say 6 sets of 12 as fast as you could rep them out. Then the next 2 weeks do board presses with 6 sets or so with some fairly heavy weight you could pause on the board and press 8 to 10 reps. Then the last 2 weeks we would use chains, 35lb chains on each side with maybe 185lb and do 6-8 sets with 10-12 reps. When you went to max that week after some of the guys were adding 40lbs to there max. Chains, bands, and board presses work wonders if you do it right.