That is almost similar to my work out routine, on the chest work out I do flat bench with a maximum weight of 120kgs for eight reps, then I do decline bench press with weight of 60kgs for 15reps and 3 sets. Then I do the dumbbells flat, incline, and decline with a constant weight of 30kgs with 10 reps of 3 sets. That is when I warm up my guns, which are worked on on Saturdays. I will try your routine for change to see if there will be any improvement.