Hello, welcome to my Nasus build. I may not be a high rank, or maybe not the best Nasus player, but I fell that my build it decently good. First, remember that I'm not a full pro and suggestions are allowed just please do not hate on me. (Note: I am new to this guide type. And I don't know how to do a lot of things regarding BBCODES.) (Note#2: Sorry for the bad guide >.< I'm really really bad at BBCODES and stuff like that. Please forgive me. I will update this later on for better readability.)
As for runes, I don't really have any specific ones you should use. But if you need/have to have them. I'd go for life steal runes mostly, or extra health/health regen. And maybe a few cooldown reduction runes here and there.
As for items. I get these (In this order)
Doran's Shield Health Potion Warding Totem
Glacial Shroud Warden's Mail B. F. Sword
Frozen Heart Spirit Visage The Bloodthirster
Trinity Force Thornmail Banshee's Veil
The reason for not much damaging items is because of Nasus having his Q stack up.
As for skill sequence, I like to use this one.
Nasus can use a few different spells that are useful. I personally like to carry Teleport and Flash. The reason for Teleport is to have map pressure. And the reason for Flash is to be able to get out of a stick situation.
Pros / Cons
You're a god tank.
You have high sustain.
You can pretty much 1v1 anyone.
Snoop Nasus OP.
Needs to last hit with Q.
Can be shut down early game easily.
This is the end of my Nasus build. I hope you enjoy it, and remember, "I will live, they will die." - Nasus
Small notes: Try to get as much Q farm as possible, you're the tank so go in first in a team fight.