First things first this build is heavy on the items, Masteries and the Runes so if you are missing some of the runes try the build but don't write it off until you have tested it. Hopefully at the end of this you will find Darius to be one of the most powerful Champions in this game if played right Darius can be one hell of a Force


(This build is also Dedicated to my son since while i was waiting for the wife to go into labor i came up with it BTW he is healthy and was 7 Pound 10 Ounces and 19.5 Inches and thank god he looks alot like his mother.)

PROS
+ Tanky
+ High Damage
+ Gap Closer
+ High Damage AoE
+ Massive Damage Ultimate
+ A slow that does Real Damage
CONS
- Ultimate requires stacks of Hemorrhage for massive Damage
- Gap Closer is a short range
- Needs Early Kills/Assists
- Needs High Creep Score
- Slow Moving

So the Runes for this are pretty Generic the Idea of this is to give us more attack damage then we would normally have to start along with some are for early game and some Magic Resist for late game. The reason for this is it makes you a bit more heavy hitting and a bit tankier in the early game while still giving you something useful in the late game.

Tank Masteries and why over AD masteries
1 Tank Masteries have more health more armor health regen and Survivability then AD. This is a common tree for alot of bruisers since they don't have as much burst as an assassin or a ADC so they make up for it by being able to survive more of a beating. Now as for the points in the AD CD reduction is more important of a couple of reasons 1 CD reduction is useful for all of your moves and 2 Darius's attack speed is not that great so adding 4% is a joke.

First start of with a Long Sword and 2x Health Potion. Early in game you will be a lot more vulnerable then in the rest of the game.
Early game is the hardest part like with most champions Darius has a couple things that if you aren't a regular Darius player you might not know.
1. Hemorrhage this is a passive ability that stacks up to 5 times. (Note: This is very effective early game.)
2. Darius isn't all that fast so always make sure to give yourself enough time to escape or have Ghost off CoolDown.
Okay so the your in the Lane and you have selected Decimate now its time to start early harrassment and farming. I am big on the harassment so if i were you i would learn the max range of Decimate. (Note: Decimate Does 50% more damage is the enemy champion is in the second damage area.)
So for easy farming and less trouble trying to focus on the creep and the enemy try to hit each creep 2 times then get in middle of creep and use Decimate. (Note: Try and hit enemy champions with the Decimate as well.

Now for high damage your best Rotation will be Decimate, Crippling Strike, then when they try to escape Apprehend, then at 5 stacks of Hemorrhage use Noxian Guillotine.
If they have 3 bars of health or less Noxian Guillotine will easily finish the job with no stacks of Hemorrhage if they have more then that don't use Noxian Guillotine because it will be a waste and you will be on cool down.

In my Opinion Late Game starts around the time you finish the Black Cleaver, Mercury's Treads, and Frozen Mallet.
Once this happens Start Pushing all lanes and work on getting your Bloodthirster and Infinity Edge.