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 good for a short game but for a long lasting game you may have some problems with some champions since they will have lot's of damage and this is build for dmg and hp/mana :)
You can take some hit's but should be carefull since you don't have alot of armor :)
Something very usefull is that your poisen will give alot of dmg together with fling :)
You could also buy warmongs armor or Archangel staff too get more hp and mana instead of zoyna's ring but I prefer these items :)