So yeah...This is my first Guide so don't be to harsh :p
Ok uhhm... I am currently sitting at Gold1 (soon Platin :3 )and I'm already playing this game since November 2010. And ever since then I've never played any other games except LoL.


So I decided to create this guide because I want to provide you with some 'Inside-Knowledge' I discovered myself.

Why Nautilus?

Nautilus is a CC-Heavy tank who -in 70% of the cases- will carry games by hisself if played correctly.
Also he's so fun to play. Especially with his Q Dredge Line , which leads over to my next 'point':
Your engage potential is SO big (over 9k) and if you are familiar with the range and casting speed of your Q you can do crazy flash->Q engages. It's just so baaammm!! :)

Here are some pictures of my Nautilus stats :)

Pros:

• heavy CC
• fast jungle clear
• good 1v1 (especially in Early Game because no one expects your heavy damage/shield)
• ganks are just so ******** overpowered with Nautilus
• great towerdiving potential

Cons:

• needs a bit time to learn
• Dredge Line is really hard to hit if you play him for the first time
• your R Depth Charge can be dodged by using Zhonya's Hourglass :(

First of all, I prefer running AP-Glyphs over MR-Glyphs because imo the MR ones would provide you with stats you don't necassairly need while jungling. Second, the AP-Glyphs boost your already insane W damage.
Furthermore I think that you really benefit from the AS-Marks because you can get more Autohits off onto the jungle creeps.

I personally don't like playing with Greater Quintessence of Movement Speed on Nautilus because you gain so much more from Greater Quintessence of Armor (x1) and Greater Quintessence of Attack Speed (x2)

For Masteries I use a very aggressive modification.

- 21 points in offense allow you to clear the jungle faster (by far) than a 9/21 or 21/9
=> allows you to gank earlier

-the 9 points in defense provide you with some extra defensive-stats which help you sustain in the jungle

Nothing special to say about the itemization since almost everything is basically listed up at the beginning.
But there are still some things I want to add:

Rush Locket of the Iron Solari Just rush it! It allows your team to attemtp doing an early dragon because of the extra shield it provides. Overall the item has great stats and the shield is just the perfect addition, especially in teamfights or 1v1 / 2v2 scrimishes.

Also I play almost always Full-Tank. In some cases I go for some AP [e.g Rylai's Crystal Scepter (which is actually really good on Naut) or Liandry's Torment ]

Explanation:

1. Start at Red Buff !!Ask your team to give you 'smiteless'!!
2. Head over to Blue Buff
3. Gank either Toplane (1) or Midlane (2), depending on where you see/have better options
4. Head back into the Jungle and farm ( Wraiths / Wolves / Golems
5. Gank Botlane [3,4,(5)] /Midlane

In-depth explanation of the gank paths 1-5:

Path 1: Pass the Nashor's Pit on it's LEFT SIDE and sneak onto the lane from behind
(shown in the Graphic)
It's important to walk up to the enemy, hit the target once to apply your passive and DO NOT TO USE YOUR Q Dredge Line ;
ONLY USE YOUR Dredge Line if the enemy attempts to run away / uses Flash ;
This advice is important for every gank !!!

Path 2: Pass the Nashor's Pit on its RIGHT SIDE and head straight onto Midlane from
BEHIND! (as shown in the Graphic)
Again, activate your W Titan's Wrath , walk up and hit the target once to apply
your Passive!

Path 3: Typical Bot-Lane-Gank. Ask your Supporter if it's warded. Then sneak from behind
onto the lane while it's pushing. It's easier for you by far if the supporter got
a form of CC like Leona, Zyra or Taric (just some random examples)
so you can land your Dredge Line perfectly! Remember to walk up and apply
your Passive by attacking them once!

Path 4: Walk through your TRI-BRUSH straight onto the lane. If it's pushed to your ALLIED
Tower, walk up and hit the enemy once to apply your Passive! If it's pushed a bit
to the ENEMY turret, use your Dredge Line to initiate!

Path 5: I call this the "Expert-Path". I don't necessairly recommend this path at early
Levels because it's practically a typical towerdive. If the Bot-Lane supporter
is tanky enough (e.g. Leona ) and if you are and experienced Nautilus Player
who can estimate the damage taken and dealt it should be quite easy!

"Gank/Kill-Succesrate":

Path 1: Generally it's 9/10
Path 2: I'm giving only 7/10 Points because Midlane is imo the hardest lane to gank 'cause
of the Jumps/Dashes/Blinks/Speed-Ups you find in Midlane!
Path 3: Something like 8/10
Path 4: Really depends on Enemy-Ward-Placement; ~8/10
Path 5: It's a high-succes/high-loss gank for -actually- both sides.

In Teamfights you want to cast your R Depth Charge on the People who are in the back so your Depth Charge eventually goes through the whole enemy Team.

Also you want to either peel for YOUR carry OR dive the ENEMY one.