Your not going to get a big bench by doing lots of flyes and tricep extensions... Your also not going to get a big squat doing leg curls and calf raises...
Squat, Press, Pull up, Row and Deadlift until your moving at least 1.5x BW bench, 2x BW squat and 2.5x BW Deadlift if you cant do them numbers isolation isnt going to get you there, doing more work on the big lifts will.
If this is wrong show me someone who got STRONG using machines and isolation work in place of compound assistance work that emphasizes on the major lifts?