This might have already been stated a lot cause I've been too busy to post on here sooner, but rushing the enemies top point at start seems like a rather strong strat. Usually teams send a group top and 1-2 people bot, so that they can take top, but this leaves their top point open to attack for a brief time. I tell my team to have 3 top and 1 both, then i wait till my team engaged them and take their tower. You've plenty of time and the extra minions sent to both sides help a bit. Now, you can shift your weight to either top or bot to help take another tower, or even wait there (i started this as eve) and wait for them to come back from fighting to retake the tower and gank them. I find that the 2v1 lane bot gets pushed out a good bit and even after i take top they don't turn back (they expect top, but they are easy to gank if they retreat top their fight in top-mid), so it's possible to even take their bot without even having to fight anyone.

For me this has been a solid strat and the best way I can think of to start the game. It might not be as strong once people stop playing death match on the map, but for now it's solid.