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.
(the items at the top goes in item sequence)
First buy a Long Sword
Second buy another Long Sword
Third buy Avarice Blade (let your gold build up dont make Youmuus just yet.)
Fourth buy Brutalizer (i go with Berserkers Boots if i have enough money, then Brutalizer.)
Fifth buy Berserkers Boots
Sixth save up money for a BF Sword, and another and another, so 3 BF Swords.
Seventh start turning your BF Swords into Bloodthirsters, or Black Cleavers.
Eighth if the game isnt over yet, make your Youmuus Ghostblade. Or you can keep letting your gold build up with Avarice Blade, and sell your Boots for a Phantom Dancer. Then Make your Youmuus later, to free up another spot. By this time it should really be over, but if its not, then throw in some another attack speed item. Or whatever you want, depending on the situation.