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 Akali you are not a tank, but you are a nuke. If you are ever in a tight spot a good getaway is to lay down Twilight Shround then Ghost in the opposite direction the enemy will expect. You have exhaust for those close laning moments where you need the enemy to do misses on you to win. Let the tanks run in first in the team fight. I suggest having a laning partner in 5v5, but in 3v3 Akali is one of the best solo laners available. Good Luck!