Just - DO IT
GET SOME RESISTANCE
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.
First rush to Ryalais, it gives you some Tankines, AP and the effekt is Godlike for Singed. For the 2th Item, pick a Tank Item like Deadman´s Plate against AD or Banshee´s Veil against AP. The effekt from Deadmans Plate is very usefull for Singed. ZZ´ Rot is a really good choice too because it gives you movement speed when you are nearly Towers, it helps you Pushing with the Void Minions and it give you Armor and Magic Resistence. For Boots Choose against your Laner oder if you are Fed go with something offensive like Magic Pen Boots. For last Items are items Like Ludens Echo or Abyssal Scepter good and for Tankiness helps Warmogs and Randuin´s Omen much.