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.
Singed is great if he is played correctly.
Start off with a Dorans Ring and a Health Pot. You're very tanky low level so try to weakin your enemys by level 2 and by level 2 you can go for first blood, if thy aanywhere near half health, you can ghost, poison, flip into your poison and ignite, they will die.. You should have some gold buy then and buy another dorans ring and lvl 1 boots. People may think its dumb to get 4 Rings but its really the only way he is an effective farmer. Once you have 4 and boots of swwiftness you already have almost 2k health and 45 AP. Get catalyst then Rod. Follow the item sequence. Youll find out about the time you pick up your FoN your practically immortal. Enjoy but remember to adapt the build to YOUR playstyle. Not every person plays the same way.