Intro
This is my first build here and i just wanted to share a way to play nasus that i dont see much but works very well for me. This build is based on getting your siphoning strike off as much as possible while having the survivability to stick around in the fight.
Please give me feedback on what you think of this guide and please try it!
Who is Nasus??
The enigmatic creature known as Nasus came to the League from a faraway world, and served as part of a vast and learned desert empire. There he was a respected and enlightened individual, having been made the Keeper of the Great Library. However, he was also part of a race of animalistic creatures that served as the rulers and protectors of the people. Unfortunately, there were others of his kind that believed they were more than protectors. They were under the egotistical delusion that they had ascended to become gods. War on Nasus's world was never more than a breath away, as these deluded others sought to enslave the people and establish a totalitarian sovereignty. In the midst of a heated battle, just as Nasus was about to slay his treacherous brother Renekton, he was pulled through the cosmos to a summoning circle in Runeterra.
At first angered that he had been taken just as he was about to cripple the enemies of his people, Nasus' advanced intellect won out when he heard the pleas of mercy from the summoners. He learned that Runeterra was also filled with its own brand of injustice. This danger was no less threatening than what he had fought against at home, and champions were needed to protect the people of this world. Heeding the call, Nasus chose to take his place in the League of Legends, knowing that his brothers and sisters would carry on the fight back home. These days, he is the Curator of the Sands, feeling most at home in the crumbling ruins of the Shurima Desert. However, recent disturbing news has reached the Keeper's ears - rumors that perhaps his brother had not in fact been left behind. If this were the case, the destruction of Renekton would quickly become Nasus' main priority, before this world too faces the threads of his brother's forked-tongue and endless ambition.
The Curator of the Sands, though contemplative, is not to be trifled with.
Runes
the runes are what i like to have but you can customize them based on your play style.
Greater Mark of Desolation i use like the armor pen for the extra damage it gives you
i like having the attack speed rune because you get in more swings during the fights.
just more attack speed
greater quintessence of desolation just more armor pen for the extra damage.
Farming
farming is a HUGE part of nasus as a champ. make sure to last hit minions with your Q all game long to build it up into lots of damage. Also, make sure to use your E on the minions to help farm or on enemy champs to harass as much as possible.
Skill Sequence
You need to start off with ]
and get straight to farming from level 1. then you want to put 1 point into 
wither so you can slow enemy champs.
then max out your 
spirit fire to harass and farm.
after that you max out your siphoning strike followed by wither.
Team Work
during team fights you want to utilize all of your abilities. nasus does not have any useless abilities so use them all. Start off by trying to get you in the middle of the fight. however fights hardly stay in once place so predict where the fight is leading.
after that you want to ult and charge in, then just start using your Q on everybody. If you built this build you should have a short cd and be able to dish out lots of damage.
after the fight if there are enemies running or your team has to run don't forget to use your
shurelya's because of the speed boost. also use your wither to chase them down or run away.
Summary
So that's my nasus build. Its a very fun build that i like to use and almost always do good with. keep in mind that this is not a tank build but an off tank bruiser build.
hopefully you try the build and have fun Qing people to death. comments and suggestions are appreciated!
Build Guide
Discussion (34)
flash is always nice to have because it will help you escape or catch up to someone.
ignite can be useful to finish off people when they get to low health. also can be used in 1v1s or team fights for the little extra damage
Regrowth Pendant- allows you, along with health pots, to keep getting near the minions to last hit them even if your getting harassed by enemy champs.
Philosopher's stone- i go back to base to buy this as soon as i get the money needed. i wouldnt recommend doing that if you dont have teleport. Nice regen for the early game.
heart of gold- for the extra money and health early on. i keep this until i need to sell it to get a 6th item.
boots of lucidity- for the cool down reduction
Trinity force- a must have item on bruisers like nasus, helps damage output a lot and syncs great with Q
Warmogs- gives you a lot of health which makes taking you down much harder, and since you should be farming at all times, getting the stacks for it should be easy and quick.
Atma's impaler- gives you a great bonus in damage with all the health you have and some extra damage.
Frozen mallet- gives you a nice health boost to help with Atma's and some extra damage. also a slow to go along with W.
Thornmail- if your getting focused by AD with madreds
Sunfire cape- good to use with your ult along with some armor if your getting focused
banshees- MR if your getting focused by casters, and also health bonus to go with atma's.
cleaver- if the other team has a lot of tanky champs and theyre stacking armor like crazy.
