This is a guide to help you become a better player as well as show you how i find the greatest success with singed. I'm tired of seeing people making singed look bad, soo here is how to do it right.

For runes, you will simply want tank ruins, but adding the magic pen will make your poison alot more effetive early game, especially against Squishies. I take armor, magic resist, and magic pen, and for quints mana bacause early game like most champs singed can use the mana and it gives bonus health due to his passive.

For Masteries I take a 9/21/0 build taking magic penatration in offense, and maxing out my defense to insure max damage output without being too squishy.

This is tricky to explain, however, as you should know, most items are situational, so the items i listed above can be swapped depending on your team and the others teams composition. Singed's core items are banshee's veil and Rod of ages, these give him great survivabilty, mana, and damage output. First off i take two health potions and a Saphire crystal for the mana and health bonus. Remember singed's passive gives him X amount of life for the amount of max mana he has.So rushing rod of ages is smart because you need time to let the effects and bonuses stack from it's passive. Also banshees veil will increase your health, mana(more health), and give u great magic resist as wll as block a spell every 45 seconds, this is great for surviving, this item has saved me more times then any other item in the game. Your last core item should be shoes, but there is a few options here. I personally perfer the boots of mobility for the huge speed bonus, but merc treds are useful for a team with huge cc(croud control) and stuns and slows, which makes it much better for chasing.

Now any other item in this build can be switched out depending on the situation, however, i use these items in a game with a balanced team. Rylai's crystal septar is my personal favorite, because on top of the health and ability power, it gives your poison a 15% slow and your fling a 35% slow, making it much easier to escape, kill, and save teamates. I highly recommend it. The frozen heart is also amazing because you get even more mana!! which means more health, and 99 armor which is great for stopping ad carries and melee characters. the passive also makes it easier to kill and slow enemies killing power, very useful for escaping and defending. Now force of nature is great because it gives a nice movement speed bonus,huge magic resist and amazing health regen giving singed even more survivability and chasing and escaping mechanisms, making it nearly immpossible to kill you. Other viable items on singed can be thornmail, abysal septar, and archangel's staff, depending on the other team's composition.

I always get my fling first to run or initiate a gank, then i max out my poison, because it is singed's main damage source, and put one point in the adhesive at at level 4, just for the slows, leveling my ultimate at levels 6, 11, and 16.

For singed i would not use anything besides ghost and ignite,early game if you are trapped by your turret, its soo easy to pick up a kill. Just flip, ignite, poison, slow, and run in front of the person so you keep on applying your poison. With ghost you can use it to chase and keep in front of your enemy, to pick up an easy kill.

Pros:
Great farmer
Great initiater
Tanky
Unique playstyle
Great Ganker
Can save teamates easily
Turns the tides of any team fight
Good for singleing out carries

Cons:
Easily avoidable if smart
Speed dependant
no true nuke(unless you count the flip)
No stuns
Not as tanky as other tanks( such as malphite or Rammus)

Singed should always be the one initiating and trying to flip the normally squishy carry to the team to pick up an easy kill, also as a tanky champ, you will need to take alot of hits and slow asmuch as you can to keep the teamfight in your fsvor.

His flip can also be used to save teamates by flipping them away in a chase, so make sure to stay near weak teamates. Also his poison can slow with crystal septar so be sure to take advantage of it as much as possible.