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.
As you can see i don't have a skill sequence on this Build, because in game I always use a different one, depending on which champions i encounter.
A very important thing if you play with Akali is that you don't hesitate in the beginning. Start off slow, by pushing enemys back and maybe have some ganks with the whole team, not on your own, early in the game.
Actually there're not to many other things to worry about once you got into the game.