Planks are boring since youre literally just waiting for stuff to happen and i still doubt its effectiveness as a hypertrophy builder compared to regular sets and reps.
push ups are a waste of time if youre already doing incline presses. theyre great for beginners but beyond a certain point you cant overload them effectively without jumping through major hoops.
http://abload.de/img/pcgamingxtuvt.jpg
http://i.imgur.com/9Yv0R2Z.jpg