this is not really a guide how to do it this is just a build i use and it works just fine for me so i thought i share the build maby some one could use it. if you go hate on it that is your call.

Lore:
Once, Nautilus was a sailor commissioned by the Institute of War to explore the uncharted reaches of the Guardian's Sea. This expedition took him deep into unknown waters where he and his crew found a vast section of black oozing liquid that none of the crew could identify. Though their job was to investigate anything new that they found, no man aboard was willing to brave the murk except Nautilus. Only moments after he donned the hulking diver's suit and climbed over the ship's rail, something lurking in the muck grabbed hold of him. He clung to the side of the ship, but the thing below pulled him fiercely, rocking the entire ship. The other sailors grew afraid and made a terrible decision. As he stared and pled for help, they wrenched his grip free of the rail. He tumbled into the ink, grabbing the anchor in futile desperation. Dark tendrils enveloped him and he could do nothing but watch as the dimming outline of his ship faded away. Then everything went black.

When Nautilus awoke, he was something... different. The great iron suit had become a seamless shell around him, concealing whatever awful truth lay inside. All the details of his memory seemed fuzzy and indistinct but one fact remained clear: he was left here, alone in the sunless depths, to die. In his hands he still clutched the anchor that belonged to the men who had condemned him. Having no other purpose, he took this clue and trudged - too heavy to swim or run - in search of answers. He wandered without direction or sense of passing time in what felt like an eternal dream. By the time he stumbled upon the shores of Bilgewater, he could find no traces of the man he was. No house, no family, no life to which he could return. Terrified sailors who'd heard his tale directed Nautilus back to the Institute, but the summoners refused to relinquish the names of the others they commissioned. By then Nautilus had learned about the League of Legends and there he saw an opportunity to discover and punish those responsible for the time and life he lost.

Crowd controller = Champion who has heavy crowd control (non-slow).
Squishy = Low-health champion / Easy to kill (Mostly focused during the teamfights).
Glass-cannon = Squishy champion with high damage output.
Spawn = Your spawning pool, place when you are rebirthed if you die. Spawn include shop.
Shop = Place when you buy new items.
Burst = High damage output over short time.
Poke/Harass = simple attack on enemy champion, during laning, to make him issues with sustain.
Bait = To attract enemy champion with your low-health, to ambush and kill him with help of your hidden teammates.
Laning Phase = Early-game phase when players (excluding Jungler) are staying in their lanes (to Farm and get XP).
Teamfight = Battle between entire teams (Only mid-late game).
Mana-starving = Champion having problems with mana, not enough mana.
Facecheck = To check brush by simply walking into it (Risk to get ambushed by enemy).
Turret aggro = when turret focus you because you attacked enemy champion.
Towerdive = to follow enemy champion to its own Turret, to kill him before Turret kills you.
Pull (Jungle term) = To hit Jungle creep with one ranged autoattack/ability, helps Jungler at start of match.

AoE = Area of effect ability (Can hit multiple targets at once).
DoT = Damage over time.
Blue = Blue buff, obtained by killing Ancient golem jungle (Helpful for AP carries standing in Solo-mid).
Red = Red buff, obtained by killing Lizard king in jungle.
CDR = Cooldown reduction.
CC = Crowd control (stun, slow, snare, fear, knock up, taunt, suppress etc.).
Root = Snare = Being immobilized.

Jungle = space between lanes, occupied by neutral creeps.
Gank/Ganking = Quick action leading to advantage (1v2, 2v3), mostly performed by Jungler.
Farming = Obtaining gold from last-hitting enemy minions.
Last-hitting = using autoattack on enemy low-health minion to obtain gold from. (Tree with last-hit priority: AD Carry -> AP Carry -> Tank -> Support).
Pushing = Quickly killing enemy minion waves to get your own minions to enemy turret.
AD carry = Champion using his autoattacks (and AD-scaling abilities) as main damage source.
AP carry = Champion using his abilities as main damage source.
Tank = Champion who is built to take big amounts of damage.
Jungler = player/champion using jungle to obtain Gold and Experience.
Fighter = Usually AD based champion with better survivability than normal AD carries.
Support = Champion who is helping other teammates (Giving them possitive auras, Healing them, shielding them etc.).

Passive - Staggering Blow


Target you hit with autoattack will be immobilized and get additional damage. Can affect same target only once per 14 seconds.

Q - Dredge Line


Nautilus throws his anchor towards chosen location, if you hit enemy, you will be pulled together and enemy will be stunned shortly and get some damage. Can be also used to pull yourself towards to terrain, if succesful, cooldown is reduced. ATTENTION: You cannot pull enemies through walls/trees/terrain.

W - Titan's Wrath


Nautilus gets shield which absorbs damage, and while active, enemies around you gets damage over time.

E - Riptide


As Nautilus stomps, water explodes of the ground in circle around you and diameter is being increased. Who is hit by water gets damage and slow effect.

R - Depth Charge


Nautilus locks up a target and sends water wave after him. Water explodes of the ground on the way to the target. Everything hit is knocked up in the air and gets damage. When wave reaches target, it's also knocked up but gets more damage and gets stunned.

i play nautilus because he looked cool even before he came out and ingame he looks really cool but i play him for the best reason because i like tanks and he is really good disrupter and pretty strong in the attacks. and afterall who doesn't want to play with a giant?
yes i know you can build him on other ways but this is just the way I play him and i only want to help other people if they have trouble with his build.