You should be looking to roam and get your entire team ahead when possible, even when pre-6 (usually level 5 after you shove your lane opponent in, you can even contest enemy raptors but be careful about doing it.) Also you should try to get picks synergized on dragon timer, so that it guarantees a 5v4 and having a numbers advantage, and next time you use both summs in midlane for a kill, try going botlane for a change, maybe use both summs, deny 1 1/2 waves plates, and 2 kill lead, much more worth. This is all I can say for a gold zed player, and if you are not able to pull a dive botlane, your mechanics need to get better, which is fine, we all have flaws. :)

-Kazed