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.
This is my first build, ALL tips and constructive criticism are HIGHLY appreciated. Thanks for taking a look...
Add: The soulstealer seems like it is fairly late in the build and it is but if you are playing well it will still work out to be worth it and if your not playing well skip the soulstealer and the rest of the build should still be able to carry you through until the end of the game. Early game does have a costly start with warmogs but if you lane mid alone you should be ok as long as you just play defensive and harass properly and wait for kill chances to come up.