Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Early Game 1-6:
So when you first start the game you get 1 point into E and you last hit minions.Once you reach level 2 you can start to get aggressive.You put the skill point into W and then you start harassing.Go into a brush and shield yourself, then W them and start auto attacking.You won't get hurt because your shield is there.So keep doing this until level 6.
Mid Game 6-12:
Now you should have enough money for Mejas so start ganking.Do the exact same thing and you should start killing your enemies and probably getting assist and stacking your mejas.Don't only shield yourself if you see your partner dieing.
Late Game 12-18:
Now you should be pretty farmed and you should have Mejas, Sorceress, Malady, and Lichbane.Now you will start raping really fast.Do the same combo and you should kill all there DPS and mages with ease.Keep targeting the DPS and mages in the group fights and you guys should be fine
GOOD LUCK and HAVE FUN :D