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.
Leblanc has a great attack, so be good last hit and when hero comes up hit them with an orb and an attack. if you do well you should be able to get first blood by the time your 5 to 7 if your mid. if you have a 2v1 go ahead and hit them when they get to your tower and play defensive. try not to get trapped in a lane so you can gank and get some stacks. just practice your skill order and moving and you can carry easily. good luck and have fun.