hi im gasdroid and this is my first guide here on mobafire.
this guide is about (many of you guys already guessed) singed.
i played singed as one of my first characters and have quite some experience with him.

pros cons
strong tank does not deal very mutch dmg
late game immoveable hard to do a good amount of harrasing
very fun to play ( let enemys dmg you short range on fling
late game and then laugh at the dmg
really done)
high mobillity

runes are very important and for singed, choosing the best is hard.
but for marks there is no better than Greater Mark of Magic Penetration.
and for seals there is no true best seal but there is this combo of the 2 best seals for singed.
becouse of this combo singed has the extra armour and hp in the lane start to survive against a ad carry and take most of the hits meant for your carry.
the glyphs are better for late game and mid game becouse then you will start to have more teamfights and may have problems with their ap carry becouse your ap carry fed him/her, so you need more mr that you get from the qlyphs.
the quintessences are just for late game when you get your Force of Nature, you will just have more profit from it and also have more profit from hp and mana.

the masteries speak for themselfes, the standard tank runes
but you can also get the masteries 1/5/24

the items give you all-surviving power so if you have the items there is little to no chance that you'll die.
they give you more armour and mr and mana and hp and hp regen and cdr, so basicly they give you everything you need to be a good singed.
it also grants enough mana regen (with blue buff) to keep on your q forever if you got a fully stacked rod of ages and a frozen heart. so keep it on, you'll regen more than you use.
the philosivers stone is just for the begin so you can sell it mid game

now we come to talk about the team work.
early game, your a support/tank so your goal is to let your carry have more farm then the other carry and you achieve that by making them think they are in the danger zone of the lane and can get flinged by you any second and then get killed or recieve really high dmg.
mid game: your still the tank so if there are teamfights you shoud go in first or let the mundo with more durability or something like that go in first but then atleast go in second.
late game: your the op tank so if there are 2 or less champions in the place where you and some high dmger are then just go for it and make those pwns and assists.

thanks to you for reading this guide and special thanks to JhoiJhoi for her awesome guide making a guide here's the link to it : http://www.mobafire.com/league-of-legends/build/making-a-guide-101506