ok I am putting this up here because I just spent a day in coast city without a win because I was put on teams of people who did not now how to play on the map and I figure someone should put up the basics here since no one wants to read the map description under game.
first the meta: the most well known meta is 1 champion top, 1 champion focusing on the top jungle, 2 champions bottom, 1 champion focusing on the bottom jungle. this allows your top champion to gain the necessary farm to push the longer top lain and be a ringer in mid to late game. the jungle is large enough and regenerates fast enough to allow 2 junglers to gain levels quickly as long as they play safe and smart. two are needed bottom because its a short lane with large amounts of room and the bottoms primary job is to hold the lane and push only if they gain the upper hand.
Rushing: 80% of the time the enemy team is going to invade the top jungle first and take out the opponents' level 2 creep, to counter this your whole team should gather on the mid stealth pad and safely do battle, no dives, and try not to die.
Other mechanics : the pads, the pads are important so pay attention to when they go active because some one needs to get them or it could mean the end for your team. the bonus for controlling one pad is a bonus to the coins earned on a coin pick up (+5) while it is in your control, at 2 pads you gain more powerful minions for top lane and +10 to coin pickup, 3 pads you get more powerful drones on the bottom lane. if a team mate tells you to help get pads then drop what you are doing and get the pads.
dooms day device: this is this maps leviathan and is not something you should get by your self. you should not even try to obtain until mid game or if you have a champion advantage. once you defeat the dooms day device you need to collect it and then you can deploy it to either severly damage and or destroy a turret, re activate a pad that has been captured by the other team and finally it can be used to eliminate the other team.
and as always I can not stress enough how important teamwork and communication are on this map (just like any other map) so talk to you team mates, and strategize. don't ignore them.