Darius is a bruiser adept at dealing high damage and taking minimal health loss. He is a very helpful champ in any situation and his ultimate and passive are phenomenal when paired with Berserker's Greaves as well as bloodthirster. but more on that later. this build is relativity new so i dont expect views right away but let me tell you this is the best build i have found for him. I hope you enjoy. As always i reccommend you watch the champion spotlight before buying/playing any champion: Play Video ENJOY!!!

Do Not get rid of berserkers greaves!!! get rid of the dorans blade!!!

MAIN SPELLS:
I found that flash works best for me with a champ like Darius because he has no natural get away ability and builds boots first so why mess with that. I found that later game though i could get more kills and assists if i had ghost so whichever your team needs, less deaths early game, go flash, more kills late game, go ghost.
Ignite is one of my favorite abilities especially when paired with a champion that has a DoT ability/passive like Darius, it is very helpful to clean up kills and get assists.
OPTIONAL SPELLS:
One optional spell that could go good with darius is, instead of flash or ghost, to have cleanse because then you can tank all of the enemies CC spells and take their slows and still get away.
Another is heal instead of any of them, this would be really useful if you were the teams tank because most tanks have a healing ability so you should too.

Pros:

Bruiser - takes little damage and deals loads.
DoT passive
Very good Ultimate
DPS friendly
high hp when built right
many different play styles
can play solo top, mid, bot, or even jungle

Cons:

Hard to master
squishy early game
relies on cs if not fed
not any real range
no natural get away ability

you can take lots of minion damage at about level 6 to 8, so you can recall whenever you have pushed about half way and still be able to tank minions before they attack your turret.
Always open up with a Decimate and then just last hit as usual that's all there is.

You NEVER want to be the first one in a fight unless it is one on one. Always wait for someone else to converge then go in immediately after. You always want to be close by. Then focus one or two champions try to hit as many as you can with Apprehend and then focus one with Crippling Strike and then as they run away use Decimate and focus the Crippled one and kill him with your ult, then move on to the next target. He is a very viable pentakill champion.

I don't know too much about jungling with Darius (I will update the guide and add a second slot when i have found a good jungle guide for him). But i do know from spectating games that if you are not good at jungling him you lost the game so i reccomend laning the first few times you play him then trying to jungle.

So if you like playing a really good champ check out Darius, The Hand of Noxus and be ready for his brother who is coming out soon.
PEACE!