It's very simple. You don't have to be flashy or play over the top of your carry even if you think they won't do everything you think they should. Your job is to enable your teammates. Time and time again the momentum of the game is decided when someone picks rubick or CM, goes boots first and has cheerleader positioning.

1: Buy sentry and block the hard camp. 2: Harry the 4 and don't let them affect the wave without you present. 3: Watch creep equilibrium and only pull when your carry has lost control of the wave. 4: Watch your aggro! you can ruin a lane just by dragging the wave all over the place, especially under a tower. 5: Walk away from the wave if there is nothing going on, there is always something to do and your carry needs to hit his timing so he can leave the lane! You don't need to split EXP down the middle just because you're both there

Griefing your pos1 means significantly lowering your chances to win the game! You don't need to kill the offlaner to win the lane, there are such things as good and bad deaths.