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.
Play Akali as anyone else would
Max out 1
But of course priority on Ultimate
Side lane and recall at level 6, buy your sword of the occult, gank mid then recall, teleport top to gank there, and the rest goes unsaid
If you get the first two ganks up this build will wreck, but if you fail you may just want to grab a standard AP item such as Rylais, Lichbane, or Zhonya's
oh and the reason that the screenshot is old is because i recently picked up akali again but ive been using the same build
With stacks on your Occult, your damage will get you Mejais stacks, which should get you leviathan and with Zhonya's that AP % increase will rock your world along with the Atma's stacking based on your Leviathans.
You may think this builds stupid but try it :)