upper chest, and calfs...
Try some presses to the neck on a flat bench or smythe machine ...keep your delts down (flat on bench or below) elbows back, and go slow and very controlled. Dont focus on weight, more on movement, and feeling it...Start with some incline bar or hammer work, then db incline (lower or different incline) then presses to the neck, and finish with some dips, elbows wide...so routine would like like this
Barbell Incline or Hammer Incline press - 2 x 15 warm ups, 1 x 10, 1 x 8, 1 x 4-6 (your heavy movement)
DB low incline press - 1 x 15 warm up, 1 x 10, 1 x 8, 1 x 6
Flat presses to neck (smythe) - 1 x 15, 1 x 12-15, 1 x 10-12, 1 x 15-20 (lighter pumping set at the end)
BW bar dips - BW x 20 reps (do 2 or 3 sets until your fully pumped to the max)
try that out and see what happens