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.
With this build I usually pwn with trynda. You should only play defensive early game, until lvl 6. Put one in "Mocking Shout" first, because you slow the enemy and your lanemate can kill him. Then max "Bloodlust", with it you can stay in the lane. With "Brawler's Gloves" and the crit chance runes you have enough crit chance in early game (16%) + your passive, too. Buy a "Zeal", then a "Phantom Dancer" for crit chance, attack speed and run speed. It's better than an "Infinity Edge" first, because it's cheaper and in mid game you need the crit and speed. After Phantom, you can get the Infinity, if you need, buy a "Vampiric Scepter" for a little lifesteal. In late game you join it in to a Bloodthirster anyway. You can buy a Black Cleaver for armor penetration if the enemy has too much armor, or a Madred's Bloodrazor if the enemy has too much HP. Before the second Phantom Dancer sell the "Avarice Blade". In late game your crits are more than 1000!