Whats crazy 8's? I find that pyramid benches work well for tone/endurance. what that is you start with a bench bar and 5 5pound weights on each side, do 5 reps. Then take off 2 of the 5's, so you have 4 then do 5 reps again, and repeat. Until you have 0 weight on there, then you do 10 reps, then after that start adding the weight back. But you must do this continuously without stopping, so it helps to have 2 assistants.