I am with Freako, do more pressing, I am benching 2-3 5time a week up to 100 reps a session aswell as high volume dips, and one session of military press., I am really wanting a bigger base as my bench has also plateaued. I am also doing db presses, bb rows, as assisatant exercises. My aim is to add 10kg plus to my 1rm in 12 -16 weeks.
Weighted dips will help build tricepts, if you have a poor lockout, paused presses, and boards / pin presses will help with off the chest issues.
now go eat.