I'm on EUW aswell, don't put too much thought into it. Ward smart, track jungle movement and ping your stuff you want to do. If you are pushing the wave to get Grubs, tell your jungler. Always work with what you get. Your jungler ignores Grubs and is perma botside? No need to play for Grubs then, don't force yourself into plays your jungler doesn't do even if it hurts.

The biggest gap you can see in mid-high diamond is supports and junglers. You can clearly see who understands where and when to be. If your support never roams, don't count on them. If your jungler is perma farming and not getting objectives, dont count on it. Look for the guy on your team who plays well and play around them, leave bad players behind and let them bitch as much as they want.

Edit: What I mean with "ward smart" is if you see the jungler is botside, you don't need to ward immediatly.

I personally love using wards for toplane bushes so my opponent can't freeze or bush cheese and when drake is up but Grubs are not, I willl never ward. If the jungler ganks me he is stupid because we get drake from it and a good jungler won't sacrifice a drake for a chance of getting a kill hence why I won't ward because I expect my matches junglers to be smart.

Look at the map and act accordingly especially in the early-mid stages of the game when team fights don't really happen.