Hi! I'm Pacal Votan, a brazillian player who likes to play with Nasus most. In this guide I'll try to work on Nasus weakness, which are his lack of mobility and engage and max his qualities.

The Grasp of the Undying is great on Nasus, making possible a good susttain and some extra damage as well.

The Demolish here is the best choice for Nasus, providing some extra damage on turrets, together with your Siphoning Strike.

Conditioning is great for Nasus, providing armor and magic resist and making him an excellen duelist after 10 minutes of the game(when you have 120 stack or some) on Siphoning Strike.

Overgrowth is nice, providing some extra health to let Nasus tankier and combo with Demolish, which's based on health points.

Manaflow Band is good for Nasus because he's mana hungry and his Spirit Fire on early game costs a lot. So it will provide Nasus a good sustain when you need to max your Spirit Fire to poke some ranged champions.

Celerity is one of the secretes of the Chase Nasus.Combining it with Boots of Swiftness, Trinity Force, Dead Man's Plate and Zz'Rot Portal will let you chase everyone like a Janna.

Teleport is essential on Nasus to not miss stacks and make some backdoor on late game.

Flash is the best option here. I don't recommend Ghost because Nasus doesn't have a good disengage, and there's no need to use it to chase: This build will do the work.

I mostly start with Cloth Armor and four Health Potion against melee champions like Riven, Yasuo, Fiora, etc. It provides armor and a good sustain to stack early .

Doran's Ring is my choice when i have to max Spirit Fire against ranged champions like Teemo, Vayne Top, Quinn, Jayce, etc. It provides some extra damage on Spirit Fire and some mana sustain.

When I face a champion that I want to evade skills, like Camille, Cho'Gath, Sion etc, I always start with Boots and four Health Potion.

Frozen Heart is my first item against melee champions. It fits very well on Nasus kit, with CDR, armor and Attack Speed reduction.

Spirit Visage is my first item against AP champions.Besides providing MR, It will give you a nice sustain with it's passive. While building Spirit Visage, is a good choice to buy Sheen as well, to give you some mana.

Boots of Swiftness is my second item here. It gives Nasus an alternative for his lack of engage and escape. It prevents Nasus for some ganks and makes him Chase everyone, combining with his Wither.

Trinity Force is the perfect item for Nasus. It gives Health, Mana, 5% of Move Speed(which is essential for a chasing build) and damage. But nothins is perfect, because it's an expensive item. If you think you are behind, just buy a Sheen and build your Trinity Force after some tank items.

Dead Man's Plate is very nice on him, because has tons of health and armor, besides the passive, that give Movement Speed(to chase and escape) and some damage.

Zz'Rot Portal is the most underrated item for Nasus, but it's one of the secrets of this build. It provides MR, Armor and Move Speed near the turrets or void gates. With Trinity Force, Dead Man's Plate and Boots of Swiftness, you will fly like a Janna. In Late game, you can spawn a void gate near a turret or an inhibitor to melt it with your Siphoning Strike and the Demolish in few seconds.